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kwin/libkwineffects/kwinglutils.cpp
Thomas Lübking db5a798952 depend glsl on TextureNPOT, not LimitedNPOT 
The idea was to block shaders that operate on
Texture2D while Texture2DRectangle was use, but
that's indeed controlled by TextureNPOT while
LimitedNPOT indicates Texture2D but without support
for mipmapping and exotic clamping

FIXED-IN: 5.6
REVIEW: 126959
2016-02-02 11:06:37 +01:00

2334 lines
81 KiB
C++
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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2006-2007 Rivo Laks <rivolaks@hot.ee>
Copyright (C) 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "kwinglutils.h"
// need to call GLTexturePrivate::initStatic()
#include "kwingltexture_p.h"
#include "kwinglcolorcorrection.h"
#include "kwineffects.h"
#include "kwinglplatform.h"
#include "logging_p.h"
#include <QPixmap>
#include <QImage>
#include <QHash>
#include <QFile>
#include <QVector2D>
#include <QVector3D>
#include <QVector4D>
#include <QMatrix4x4>
#include <QVarLengthArray>
#include <array>
#include <deque>
#include <math.h>
#if HAVE_EPOXY_GLX
#include <epoxy/glx.h>
#endif
#define DEBUG_GLRENDERTARGET 0
#define MAKE_GL_VERSION(major, minor, release) ( ((major) << 16) | ((minor) << 8) | (release) )
#ifdef __GNUC__
# define likely(x) __builtin_expect(!!(x), 1)
# define unlikely(x) __builtin_expect(!!(x), 0)
#else
# define likely(x) (x)
# define unlikely(x) (x)
#endif
namespace KWin
{
// Variables
// GL version, use MAKE_GL_VERSION() macro for comparing with a specific version
static int glVersion;
// GLX version, use MAKE_GL_VERSION() macro for comparing with a specific version
static int glXVersion;
// EGL version, use MAKE_GL_VERSION() macro for comparing with a specific version
static int eglVersion;
// List of all supported GL, EGL and GLX extensions
static QList<QByteArray> glExtensions;
static QList<QByteArray> glxExtensions;
static QList<QByteArray> eglExtensions;
int glTextureUnitsCount;
// Functions
void initGLX()
{
#if HAVE_EPOXY_GLX
// Get GLX version
int major, minor;
glXQueryVersion(display(), &major, &minor);
glXVersion = MAKE_GL_VERSION(major, minor, 0);
// Get list of supported GLX extensions
const QByteArray string = (const char *) glXQueryExtensionsString(display(), QX11Info::appScreen());
glxExtensions = string.split(' ');
glxResolveFunctions();
#endif
}
void initEGL()
{
EGLDisplay dpy = eglGetCurrentDisplay();
if (dpy == EGL_NO_DISPLAY)
dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
int major, minor;
eglInitialize(dpy, &major, &minor);
eglVersion = MAKE_GL_VERSION(major, minor, 0);
const QByteArray string = eglQueryString(dpy, EGL_EXTENSIONS);
eglExtensions = string.split(' ');
eglResolveFunctions();
}
void initGL(OpenGLPlatformInterface platformInterface)
{
// Get OpenGL version
const char* glversioncstring = (const char*)glGetString(GL_VERSION);
QByteArray glversionstring = QByteArray::fromRawData(glversioncstring, qstrlen(glversioncstring));
if (glversionstring.startsWith("OpenGL ES ")) {
glversionstring = glversionstring.mid(10);
}
const int whiteSpaceIndex = glversionstring.indexOf(' ');
if (whiteSpaceIndex != -1) {
glversionstring.truncate(whiteSpaceIndex);
}
auto glversioninfo = glversionstring.split('.');
while (glversioninfo.count() < 3)
glversioninfo << "0";
glVersion = MAKE_GL_VERSION(glversioninfo[0].toInt(), glversioninfo[1].toInt(), glversioninfo[2].toInt());
// Get list of supported OpenGL extensions
if (hasGLVersion(3, 0)) {
int count;
glGetIntegerv(GL_NUM_EXTENSIONS, &count);
for (int i = 0; i < count; i++) {
const QByteArray name = (const char *) glGetStringi(GL_EXTENSIONS, i);
glExtensions << name;
}
} else
glExtensions = QByteArray((const char*)glGetString(GL_EXTENSIONS)).split(' ');
// handle OpenGL extensions functions
glResolveFunctions(platformInterface);
GLTexturePrivate::initStatic();
GLRenderTarget::initStatic();
GLVertexBuffer::initStatic();
}
void cleanupGL()
{
ShaderManager::cleanup();
GLTexturePrivate::cleanup();
GLRenderTarget::cleanup();
GLVertexBuffer::cleanup();
GLPlatform::cleanup();
glExtensions.clear();
glxExtensions.clear();
eglExtensions.clear();
glVersion = 0;
glXVersion = 0;
eglVersion = 0;
glTextureUnitsCount = 0;
}
bool hasGLVersion(int major, int minor, int release)
{
return glVersion >= MAKE_GL_VERSION(major, minor, release);
}
bool hasGLXVersion(int major, int minor, int release)
{
return glXVersion >= MAKE_GL_VERSION(major, minor, release);
}
bool hasEGLVersion(int major, int minor, int release)
{
return eglVersion >= MAKE_GL_VERSION(major, minor, release);
}
bool hasGLExtension(const QByteArray &extension)
{
return glExtensions.contains(extension) || glxExtensions.contains(extension) || eglExtensions.contains(extension);
}
static QString formatGLError(GLenum err)
{
switch(err) {
case GL_NO_ERROR: return QStringLiteral("GL_NO_ERROR");
case GL_INVALID_ENUM: return QStringLiteral("GL_INVALID_ENUM");
case GL_INVALID_VALUE: return QStringLiteral("GL_INVALID_VALUE");
case GL_INVALID_OPERATION: return QStringLiteral("GL_INVALID_OPERATION");
case GL_STACK_OVERFLOW: return QStringLiteral("GL_STACK_OVERFLOW");
case GL_STACK_UNDERFLOW: return QStringLiteral("GL_STACK_UNDERFLOW");
case GL_OUT_OF_MEMORY: return QStringLiteral("GL_OUT_OF_MEMORY");
default: return QLatin1String("0x") + QString::number(err, 16);
}
}
bool checkGLError(const char* txt)
{
GLenum err = glGetError();
bool hasError = false;
while (err != GL_NO_ERROR) {
qCWarning(LIBKWINGLUTILS) << "GL error (" << txt << "): " << formatGLError(err);
hasError = true;
err = glGetError();
}
return hasError;
}
// TODO: Drop for Plasma 6, no longer needed after OpenGL 2.0
int nearestPowerOfTwo(int x)
{
unsigned y = static_cast<unsigned>(x);
// From Hank Warren's "Hacker's Delight", clp2() method.
// Works for up to 32-bit integers.
y = y - 1;
y = y | (y >> 1);
y = y | (y >> 2);
y = y | (y >> 4);
y = y | (y >> 8);
y = y | (y >> 16);
return static_cast<int>(y + 1);
}
//****************************************
// GLShader
//****************************************
bool GLShader::sColorCorrect = false;
GLShader::GLShader(unsigned int flags)
: mValid(false)
, mLocationsResolved(false)
, mExplicitLinking(flags & ExplicitLinking)
{
mProgram = glCreateProgram();
}
GLShader::GLShader(const QString& vertexfile, const QString& fragmentfile, unsigned int flags)
: mValid(false)
, mLocationsResolved(false)
, mExplicitLinking(flags & ExplicitLinking)
{
mProgram = glCreateProgram();
loadFromFiles(vertexfile, fragmentfile);
}
GLShader::~GLShader()
{
if (mProgram) {
glDeleteProgram(mProgram);
}
}
bool GLShader::loadFromFiles(const QString &vertexFile, const QString &fragmentFile)
{
QFile vf(vertexFile);
if (!vf.open(QIODevice::ReadOnly)) {
qCCritical(LIBKWINGLUTILS) << "Couldn't open" << vertexFile << "for reading!";
return false;
}
const QByteArray vertexSource = vf.readAll();
QFile ff(fragmentFile);
if (!ff.open(QIODevice::ReadOnly)) {
qCCritical(LIBKWINGLUTILS) << "Couldn't open" << fragmentFile << "for reading!";
return false;
}
const QByteArray fragmentSource = ff.readAll();
return load(vertexSource, fragmentSource);
}
bool GLShader::link()
{
// Be optimistic
mValid = true;
glLinkProgram(mProgram);
// Get the program info log
int maxLength, length;
glGetProgramiv(mProgram, GL_INFO_LOG_LENGTH, &maxLength);
QByteArray log(maxLength, 0);
glGetProgramInfoLog(mProgram, maxLength, &length, log.data());
// Make sure the program linked successfully
int status;
glGetProgramiv(mProgram, GL_LINK_STATUS, &status);
if (status == 0) {
qCCritical(LIBKWINGLUTILS) << "Failed to link shader:" << endl << log;
mValid = false;
} else if (length > 0) {
qCDebug(LIBKWINGLUTILS) << "Shader link log:" << log;
}
return mValid;
}
const QByteArray GLShader::prepareSource(GLenum shaderType, const QByteArray &source) const
{
// Prepare the source code
QByteArray ba;
if (GLPlatform::instance()->isGLES() && GLPlatform::instance()->glslVersion() < kVersionNumber(3, 0)) {
ba.append("precision highp float;\n");
}
if (ShaderManager::instance()->isShaderDebug()) {
ba.append("#define KWIN_SHADER_DEBUG 1\n");
}
ba.append(source);
if (GLPlatform::instance()->isGLES() && GLPlatform::instance()->glslVersion() >= kVersionNumber(3, 0)) {
ba.replace("#version 140", "#version 300 es\n\nprecision highp float;\n");
}
// Inject color correction code for fragment shaders, if possible
if (shaderType == GL_FRAGMENT_SHADER && sColorCorrect)
ba = ColorCorrection::prepareFragmentShader(ba);
return ba;
}
bool GLShader::compile(GLuint program, GLenum shaderType, const QByteArray &source) const
{
GLuint shader = glCreateShader(shaderType);
QByteArray preparedSource = prepareSource(shaderType, source);
const char* src = preparedSource.constData();
glShaderSource(shader, 1, &src, nullptr);
// Compile the shader
glCompileShader(shader);
// Get the shader info log
int maxLength, length;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &maxLength);
QByteArray log(maxLength, 0);
glGetShaderInfoLog(shader, maxLength, &length, log.data());
// Check the status
int status;
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if (status == 0) {
const char *typeName = (shaderType == GL_VERTEX_SHADER ? "vertex" : "fragment");
qCCritical(LIBKWINGLUTILS) << "Failed to compile" << typeName << "shader:" << endl << log;
} else if (length > 0)
qCDebug(LIBKWINGLUTILS) << "Shader compile log:" << log;
if (status != 0)
glAttachShader(program, shader);
glDeleteShader(shader);
return status != 0;
}
bool GLShader::load(const QByteArray &vertexSource, const QByteArray &fragmentSource)
{
// Make sure shaders are actually supported
if (!(GLPlatform::instance()->supports(GLSL) &&
// we lack shader branching for Texture2DRectangle everywhere - and it's probably not worth it
GLPlatform::instance()->supports(TextureNPOT))) {
qCCritical(LIBKWINGLUTILS) << "Shaders are not supported";
return false;
}
mValid = false;
// Compile the vertex shader
if (!vertexSource.isEmpty()) {
bool success = compile(mProgram, GL_VERTEX_SHADER, vertexSource);
if (!success)
return false;
}
// Compile the fragment shader
if (!fragmentSource.isEmpty()) {
bool success = compile(mProgram, GL_FRAGMENT_SHADER, fragmentSource);
if (!success)
return false;
}
if (mExplicitLinking)
return true;
// link() sets mValid
return link();
}
void GLShader::bindAttributeLocation(const char *name, int index)
{
glBindAttribLocation(mProgram, index, name);
}
void GLShader::bindFragDataLocation(const char *name, int index)
{
if (!GLPlatform::instance()->isGLES() && (hasGLVersion(3, 0) || hasGLExtension(QByteArrayLiteral("GL_EXT_gpu_shader4"))))
glBindFragDataLocation(mProgram, index, name);
}
void GLShader::bind()
{
glUseProgram(mProgram);
}
void GLShader::unbind()
{
glUseProgram(0);
}
void GLShader::resolveLocations()
{
if (mLocationsResolved)
return;
mMatrixLocation[TextureMatrix] = uniformLocation("textureMatrix");
mMatrixLocation[ProjectionMatrix] = uniformLocation("projection");
mMatrixLocation[ModelViewMatrix] = uniformLocation("modelview");
mMatrixLocation[ModelViewProjectionMatrix] = uniformLocation("modelViewProjectionMatrix");
mMatrixLocation[WindowTransformation] = uniformLocation("windowTransformation");
mMatrixLocation[ScreenTransformation] = uniformLocation("screenTransformation");
mVec2Location[Offset] = uniformLocation("offset");
mVec4Location[ModulationConstant] = uniformLocation("modulation");
mFloatLocation[Saturation] = uniformLocation("saturation");
mIntLocation[ColorCorrectionLookupTextureUnit] = uniformLocation("u_ccLookupTexture");
mColorLocation[Color] = uniformLocation("geometryColor");
mLocationsResolved = true;
}
int GLShader::uniformLocation(const char *name)
{
const int location = glGetUniformLocation(mProgram, name);
return location;
}
bool GLShader::setUniform(GLShader::MatrixUniform uniform, const QMatrix4x4 &matrix)
{
resolveLocations();
return setUniform(mMatrixLocation[uniform], matrix);
}
bool GLShader::setUniform(GLShader::Vec2Uniform uniform, const QVector2D &value)
{
resolveLocations();
return setUniform(mVec2Location[uniform], value);
}
bool GLShader::setUniform(GLShader::Vec4Uniform uniform, const QVector4D &value)
{
resolveLocations();
return setUniform(mVec4Location[uniform], value);
}
bool GLShader::setUniform(GLShader::FloatUniform uniform, float value)
{
resolveLocations();
return setUniform(mFloatLocation[uniform], value);
}
bool GLShader::setUniform(GLShader::IntUniform uniform, int value)
{
resolveLocations();
return setUniform(mIntLocation[uniform], value);
}
bool GLShader::setUniform(GLShader::ColorUniform uniform, const QVector4D &value)
{
resolveLocations();
return setUniform(mColorLocation[uniform], value);
}
bool GLShader::setUniform(GLShader::ColorUniform uniform, const QColor &value)
{
resolveLocations();
return setUniform(mColorLocation[uniform], value);
}
bool GLShader::setUniform(const char *name, float value)
{
const int location = uniformLocation(name);
return setUniform(location, value);
}
bool GLShader::setUniform(const char *name, int value)
{
const int location = uniformLocation(name);
return setUniform(location, value);
}
bool GLShader::setUniform(const char *name, const QVector2D& value)
{
const int location = uniformLocation(name);
return setUniform(location, value);
}
bool GLShader::setUniform(const char *name, const QVector3D& value)
{
const int location = uniformLocation(name);
return setUniform(location, value);
}
bool GLShader::setUniform(const char *name, const QVector4D& value)
{
const int location = uniformLocation(name);
return setUniform(location, value);
}
bool GLShader::setUniform(const char *name, const QMatrix4x4& value)
{
const int location = uniformLocation(name);
return setUniform(location, value);
}
bool GLShader::setUniform(const char *name, const QColor& color)
{
const int location = uniformLocation(name);
return setUniform(location, color);
}
bool GLShader::setUniform(int location, float value)
{
if (location >= 0) {
glUniform1f(location, value);
}
return (location >= 0);
}
bool GLShader::setUniform(int location, int value)
{
if (location >= 0) {
glUniform1i(location, value);
}
return (location >= 0);
}
bool GLShader::setUniform(int location, const QVector2D &value)
{
if (location >= 0) {
glUniform2fv(location, 1, (const GLfloat*)&value);
}
return (location >= 0);
}
bool GLShader::setUniform(int location, const QVector3D &value)
{
if (location >= 0) {
glUniform3fv(location, 1, (const GLfloat*)&value);
}
return (location >= 0);
}
bool GLShader::setUniform(int location, const QVector4D &value)
{
if (location >= 0) {
glUniform4fv(location, 1, (const GLfloat*)&value);
}
return (location >= 0);
}
bool GLShader::setUniform(int location, const QMatrix4x4 &value)
{
if (location >= 0) {
GLfloat m[16];
const auto *data = value.constData();
// i is column, j is row for m
for (int i = 0; i < 16; ++i) {
m[i] = data[i];
}
glUniformMatrix4fv(location, 1, GL_FALSE, m);
}
return (location >= 0);
}
bool GLShader::setUniform(int location, const QColor &color)
{
if (location >= 0) {
glUniform4f(location, color.redF(), color.greenF(), color.blueF(), color.alphaF());
}
return (location >= 0);
}
int GLShader::attributeLocation(const char* name)
{
int location = glGetAttribLocation(mProgram, name);
return location;
}
bool GLShader::setAttribute(const char* name, float value)
{
int location = attributeLocation(name);
if (location >= 0) {
glVertexAttrib1f(location, value);
}
return (location >= 0);
}
QMatrix4x4 GLShader::getUniformMatrix4x4(const char* name)
{
int location = uniformLocation(name);
if (location >= 0) {
GLfloat m[16];
glGetnUniformfv(mProgram, location, sizeof(m), m);
QMatrix4x4 matrix(m[0], m[4], m[8], m[12],
m[1], m[5], m[9], m[13],
m[2], m[6], m[10], m[14],
m[3], m[7], m[11], m[15]);
matrix.optimize();
return matrix;
} else {
return QMatrix4x4();
}
}
//****************************************
// ShaderManager
//****************************************
ShaderManager *ShaderManager::s_shaderManager = nullptr;
ShaderManager *ShaderManager::instance()
{
if (!s_shaderManager) {
s_shaderManager = new ShaderManager();
}
return s_shaderManager;
}
void ShaderManager::cleanup()
{
delete s_shaderManager;
s_shaderManager = nullptr;
}
ShaderManager::ShaderManager()
{
m_debug = qstrcmp(qgetenv("KWIN_GL_DEBUG"), "1") == 0;
const qint64 coreVersionNumber = GLPlatform::instance()->isGLES() ? kVersionNumber(3, 0) : kVersionNumber(1, 40);
if (GLPlatform::instance()->glslVersion() >= coreVersionNumber) {
m_resourcePath = QStringLiteral(":/effect-shaders-1.40/");
} else {
m_resourcePath = QStringLiteral(":/effect-shaders-1.10/");
}
}
ShaderManager::~ShaderManager()
{
while (!m_boundShaders.isEmpty()) {
popShader();
}
qDeleteAll(m_shaderHash);
m_shaderHash.clear();
}
static bool fuzzyCompare(const QVector4D &lhs, const QVector4D &rhs)
{
const float epsilon = 1.0f / 255.0f;
return lhs[0] >= rhs[0] - epsilon && lhs[0] <= rhs[0] + epsilon &&
lhs[1] >= rhs[1] - epsilon && lhs[1] <= rhs[1] + epsilon &&
lhs[2] >= rhs[2] - epsilon && lhs[2] <= rhs[2] + epsilon &&
lhs[3] >= rhs[3] - epsilon && lhs[3] <= rhs[3] + epsilon;
}
static bool checkPixel(int x, int y, const QVector4D &expected, const char *file, int line)
{
uint8_t data[4];
glReadnPixels(x, y, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, 4, data);
const QVector4D pixel{data[0] / 255.f, data[1] / 255.f, data[2] / 255.f, data[3] / 255.f};
if (fuzzyCompare(pixel, expected))
return true;
QMessageLogger(file, line, nullptr).warning() << "Pixel was" << pixel << "expected" << expected;
return false;
}
#define CHECK_PIXEL(x, y, expected) \
checkPixel(x, y, expected, __FILE__, __LINE__)
static QVector4D adjustSaturation(const QVector4D &color, float saturation)
{
const float gray = QVector3D::dotProduct(color.toVector3D(), {0.2126, 0.7152, 0.0722});
return QVector4D{gray, gray, gray, color.w()} * (1.0f - saturation) + color * saturation;
}
bool ShaderManager::selfTest()
{
bool pass = true;
if (!GLRenderTarget::supported()) {
qCWarning(LIBKWINGLUTILS) << "Framebuffer objects not supported - skipping shader tests";
return true;
}
// Create the source texture
QImage image(2, 2, QImage::Format_ARGB32_Premultiplied);
image.setPixel(0, 0, 0xffff0000); // Red
image.setPixel(1, 0, 0xff00ff00); // Green
image.setPixel(0, 1, 0xff0000ff); // Blue
image.setPixel(1, 1, 0xffffffff); // White
GLTexture src(image);
src.setFilter(GL_NEAREST);
// Create the render target
GLTexture dst(GL_RGBA8, 32, 32);
GLRenderTarget fbo(dst);
GLRenderTarget::pushRenderTarget(&fbo);
// Set up the vertex buffer
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
const GLVertexAttrib attribs[] {
{ VA_Position, 2, GL_FLOAT, offsetof(GLVertex2D, position) },
{ VA_TexCoord, 2, GL_FLOAT, offsetof(GLVertex2D, texcoord) },
};
vbo->setAttribLayout(attribs, 2, sizeof(GLVertex2D));
GLVertex2D *verts = (GLVertex2D*) vbo->map(6 * sizeof(GLVertex2D));
verts[0] = GLVertex2D{{0, 0}, {0, 0}}; // Top left
verts[1] = GLVertex2D{{0, 32}, {0, 1}}; // Bottom left
verts[2] = GLVertex2D{{32, 0}, {1, 0}}; // Top right
verts[3] = GLVertex2D{{32, 0}, {1, 0}}; // Top right
verts[4] = GLVertex2D{{0, 32}, {0, 1}}; // Bottom left
verts[5] = GLVertex2D{{32, 32}, {1, 1}}; // Bottom right
vbo->unmap();
vbo->bindArrays();
glViewport(0, 0, 32, 32);
glClearColor(0, 0, 0, 0);
// Set up the projection matrix
QMatrix4x4 matrix;
matrix.ortho(QRect(0, 0, 32, 32));
// Bind the source texture
src.bind();
const QVector4D red {1.0f, 0.0f, 0.0f, 1.0f};
const QVector4D green {0.0f, 1.0f, 0.0f, 1.0f};
const QVector4D blue {0.0f, 0.0f, 1.0f, 1.0f};
const QVector4D white {1.0f, 1.0f, 1.0f, 1.0f};
// Note: To see the line number in error messages, set
// QT_MESSAGE_PATTERN="%{message} (%{file}:%{line})"
// Test solid color
GLShader *shader = pushShader(ShaderTrait::UniformColor);
if (shader->isValid()) {
glClear(GL_COLOR_BUFFER_BIT);
shader->setUniform(GLShader::ModelViewProjectionMatrix, matrix);
shader->setUniform(GLShader::Color, green);
vbo->draw(GL_TRIANGLES, 0, 6);
pass = CHECK_PIXEL(8, 24, green) && pass;
pass = CHECK_PIXEL(24, 24, green) && pass;
pass = CHECK_PIXEL(8, 8, green) && pass;
pass = CHECK_PIXEL(24, 8, green) && pass;
} else {
pass = false;
}
popShader();
// Test texture mapping
shader = pushShader(ShaderTrait::MapTexture);
if (shader->isValid()) {
glClear(GL_COLOR_BUFFER_BIT);
shader->setUniform(GLShader::ModelViewProjectionMatrix, matrix);
vbo->draw(GL_TRIANGLES, 0, 6);
pass = CHECK_PIXEL(8, 24, red) && pass;
pass = CHECK_PIXEL(24, 24, green) && pass;
pass = CHECK_PIXEL(8, 8, blue) && pass;
pass = CHECK_PIXEL(24, 8, white) && pass;
} else {
pass = false;
}
popShader();
// Test saturation filter
shader = pushShader(ShaderTrait::MapTexture | ShaderTrait::AdjustSaturation);
if (shader->isValid()) {
glClear(GL_COLOR_BUFFER_BIT);
const float saturation = .3;
shader->setUniform(GLShader::ModelViewProjectionMatrix, matrix);
shader->setUniform(GLShader::Saturation, saturation);
vbo->draw(GL_TRIANGLES, 0, 6);
pass = CHECK_PIXEL(8, 24, adjustSaturation(red, saturation)) && pass;
pass = CHECK_PIXEL(24, 24, adjustSaturation(green, saturation)) && pass;
pass = CHECK_PIXEL(8, 8, adjustSaturation(blue, saturation)) && pass;
pass = CHECK_PIXEL(24, 8, adjustSaturation(white, saturation)) && pass;
} else {
pass = false;
}
popShader();
// Test modulation filter
shader = pushShader(ShaderTrait::MapTexture | ShaderTrait::Modulate);
if (shader->isValid()) {
glClear(GL_COLOR_BUFFER_BIT);
const QVector4D modulation{.3f, .4f, .5f, .6f};
shader->setUniform(GLShader::ModelViewProjectionMatrix, matrix);
shader->setUniform(GLShader::ModulationConstant, modulation);
vbo->draw(GL_TRIANGLES, 0, 6);
pass = CHECK_PIXEL(8, 24, red * modulation) && pass;
pass = CHECK_PIXEL(24, 24, green * modulation) && pass;
pass = CHECK_PIXEL(8, 8, blue * modulation) && pass;
pass = CHECK_PIXEL(24, 8, white * modulation) && pass;
} else {
pass = false;
}
popShader();
// Test saturation + modulation
shader = pushShader(ShaderTrait::MapTexture | ShaderTrait::AdjustSaturation | ShaderTrait::Modulate);
if (shader->isValid()) {
glClear(GL_COLOR_BUFFER_BIT);
const QVector4D modulation{.3f, .4f, .5f, .6f};
const float saturation = .3;
shader->setUniform(GLShader::ModelViewProjectionMatrix, matrix);
shader->setUniform(GLShader::ModulationConstant, modulation);
shader->setUniform(GLShader::Saturation, saturation);
vbo->draw(GL_TRIANGLES, 0, 6);
pass = CHECK_PIXEL(8, 24, adjustSaturation(red * modulation, saturation)) && pass;
pass = CHECK_PIXEL(24, 24, adjustSaturation(green * modulation, saturation)) && pass;
pass = CHECK_PIXEL(8, 8, adjustSaturation(blue * modulation, saturation)) && pass;
pass = CHECK_PIXEL(24, 8, adjustSaturation(white * modulation, saturation)) && pass;
} else {
pass = false;
}
popShader();
vbo->unbindArrays();
GLRenderTarget::popRenderTarget();
return pass;
}
QByteArray ShaderManager::generateVertexSource(ShaderTraits traits) const
{
QByteArray source;
QTextStream stream(&source);
GLPlatform * const gl = GLPlatform::instance();
QByteArray attribute, varying;
if (!gl->isGLES()) {
const bool glsl_140 = gl->glslVersion() >= kVersionNumber(1, 40);
attribute = glsl_140 ? QByteArrayLiteral("in") : QByteArrayLiteral("attribute");
varying = glsl_140 ? QByteArrayLiteral("out") : QByteArrayLiteral("varying");
if (glsl_140)
stream << "#version 140\n\n";
} else {
const bool glsl_es_300 = gl->glslVersion() >= kVersionNumber(3, 0);
attribute = glsl_es_300 ? QByteArrayLiteral("in") : QByteArrayLiteral("attribute");
varying = glsl_es_300 ? QByteArrayLiteral("out") : QByteArrayLiteral("varying");
if (glsl_es_300)
stream << "#version 300 es\n\n";
}
stream << attribute << " vec4 position;\n";
if (traits & ShaderTrait::MapTexture) {
stream << attribute << " vec4 texcoord;\n\n";
stream << varying << " vec2 texcoord0;\n\n";
} else
stream << "\n";
stream << "uniform mat4 modelViewProjectionMatrix;\n\n";
stream << "void main()\n{\n";
if (traits & ShaderTrait::MapTexture)
stream << " texcoord0 = texcoord.st;\n";
stream << " gl_Position = modelViewProjectionMatrix * position;\n";
stream << "}\n";
stream.flush();
return source;
}
QByteArray ShaderManager::generateFragmentSource(ShaderTraits traits) const
{
QByteArray source;
QTextStream stream(&source);
GLPlatform * const gl = GLPlatform::instance();
QByteArray varying, output, textureLookup;
if (!gl->isGLES()) {
const bool glsl_140 = gl->glslVersion() >= kVersionNumber(1, 40);
if (glsl_140)
stream << "#version 140\n\n";
varying = glsl_140 ? QByteArrayLiteral("in") : QByteArrayLiteral("varying");
textureLookup = glsl_140 ? QByteArrayLiteral("texture") : QByteArrayLiteral("texture2D");
output = glsl_140 ? QByteArrayLiteral("fragColor") : QByteArrayLiteral("gl_FragColor");
} else {
const bool glsl_es_300 = GLPlatform::instance()->glslVersion() >= kVersionNumber(3, 0);
if (glsl_es_300)
stream << "#version 300 es\n\n";
// From the GLSL ES specification:
//
// "The fragment language has no default precision qualifier for floating point types."
stream << "precision highp float;\n\n";
varying = glsl_es_300 ? QByteArrayLiteral("in") : QByteArrayLiteral("varying");
textureLookup = glsl_es_300 ? QByteArrayLiteral("texture") : QByteArrayLiteral("texture2D");
output = glsl_es_300 ? QByteArrayLiteral("fragColor") : QByteArrayLiteral("gl_FragColor");
}
if (traits & ShaderTrait::MapTexture) {
stream << "uniform sampler2D sampler;\n";
if (traits & ShaderTrait::Modulate)
stream << "uniform vec4 modulation;\n";
if (traits & ShaderTrait::AdjustSaturation)
stream << "uniform float saturation;\n";
stream << "\n" << varying << " vec2 texcoord0;\n";
} else if (traits & ShaderTrait::UniformColor)
stream << "uniform vec4 geometryColor;\n";
if (output != QByteArrayLiteral("gl_FragColor"))
stream << "\nout vec4 " << output << ";\n";
stream << "\nvoid main(void)\n{\n";
if (traits & ShaderTrait::MapTexture) {
if (traits & (ShaderTrait::Modulate | ShaderTrait::AdjustSaturation)) {
stream << " vec4 texel = " << textureLookup << "(sampler, texcoord0);\n";
if (traits & ShaderTrait::Modulate)
stream << " texel *= modulation;\n";
if (traits & ShaderTrait::AdjustSaturation)
stream << " texel.rgb = mix(vec3(dot(texel.rgb, vec3(0.2126, 0.7152, 0.0722))), texel.rgb, saturation);\n";
stream << " " << output << " = texel;\n";
} else {
stream << " " << output << " = " << textureLookup << "(sampler, texcoord0);\n";
}
} else if (traits & ShaderTrait::UniformColor)
stream << " " << output << " = geometryColor;\n";
stream << "}";
stream.flush();
return source;
}
GLShader *ShaderManager::generateShader(ShaderTraits traits)
{
return generateCustomShader(traits);
}
GLShader *ShaderManager::generateCustomShader(ShaderTraits traits, const QByteArray &vertexSource, const QByteArray &fragmentSource)
{
const QByteArray vertex = vertexSource.isEmpty() ? generateVertexSource(traits) : vertexSource;
const QByteArray fragment = fragmentSource.isEmpty() ? generateFragmentSource(traits) : fragmentSource;
#if 0
qCDebug(LIBKWINGLUTILS) << "**************";
qCDebug(LIBKWINGLUTILS) << vertex;
qCDebug(LIBKWINGLUTILS) << "**************";
qCDebug(LIBKWINGLUTILS) << fragment;
qCDebug(LIBKWINGLUTILS) << "**************";
#endif
GLShader *shader = new GLShader(GLShader::ExplicitLinking);
shader->load(vertex, fragment);
shader->bindAttributeLocation("position", VA_Position);
shader->bindAttributeLocation("texcoord", VA_TexCoord);
shader->bindFragDataLocation("fragColor", 0);
shader->link();
return shader;
}
GLShader *ShaderManager::generateShaderFromResources(ShaderTraits traits, const QString &vertexFile, const QString &fragmentFile)
{
auto loadShaderFile = [this] (const QString &fileName) {
QFile file(m_resourcePath + fileName);
if (file.open(QIODevice::ReadOnly)) {
return file.readAll();
}
qCCritical(LIBKWINGLUTILS) << "Failed to read shader " << fileName;
return QByteArray();
};
QByteArray vertexSource;
QByteArray fragmentSource;
if (!vertexFile.isEmpty()) {
vertexSource = loadShaderFile(vertexFile);
if (vertexSource.isEmpty()) {
return new GLShader();
}
}
if (!fragmentFile.isEmpty()) {
fragmentSource = loadShaderFile(fragmentFile);
if (fragmentSource.isEmpty()) {
return new GLShader();
}
}
return generateCustomShader(traits, vertexSource, fragmentSource);
}
GLShader *ShaderManager::shader(ShaderTraits traits)
{
GLShader *shader = m_shaderHash.value(traits);
if (!shader) {
shader = generateShader(traits);
m_shaderHash.insert(traits, shader);
}
return shader;
}
GLShader *ShaderManager::getBoundShader() const
{
if (m_boundShaders.isEmpty()) {
return nullptr;
} else {
return m_boundShaders.top();
}
}
bool ShaderManager::isShaderBound() const
{
return !m_boundShaders.isEmpty();
}
bool ShaderManager::isShaderDebug() const
{
return m_debug;
}
GLShader *ShaderManager::pushShader(ShaderTraits traits)
{
GLShader *shader = this->shader(traits);
pushShader(shader);
return shader;
}
void ShaderManager::pushShader(GLShader *shader)
{
// only bind shader if it is not already bound
if (shader != getBoundShader()) {
shader->bind();
}
m_boundShaders.push(shader);
}
void ShaderManager::popShader()
{
if (m_boundShaders.isEmpty()) {
return;
}
GLShader *shader = m_boundShaders.pop();
if (m_boundShaders.isEmpty()) {
// no more shader bound - unbind
shader->unbind();
} else if (shader != m_boundShaders.top()) {
// only rebind if a different shader is on top of stack
m_boundShaders.top()->bind();
}
}
void ShaderManager::bindFragDataLocations(GLShader *shader)
{
shader->bindFragDataLocation("fragColor", 0);
}
void ShaderManager::bindAttributeLocations(GLShader *shader) const
{
shader->bindAttributeLocation("vertex", VA_Position);
shader->bindAttributeLocation("texCoord", VA_TexCoord);
}
GLShader *ShaderManager::loadShaderFromCode(const QByteArray &vertexSource, const QByteArray &fragmentSource)
{
GLShader *shader = new GLShader(GLShader::ExplicitLinking);
shader->load(vertexSource, fragmentSource);
bindAttributeLocations(shader);
bindFragDataLocations(shader);
shader->link();
return shader;
}
/*** GLRenderTarget ***/
bool GLRenderTarget::sSupported = false;
bool GLRenderTarget::s_blitSupported = false;
QStack<GLRenderTarget*> GLRenderTarget::s_renderTargets = QStack<GLRenderTarget*>();
QSize GLRenderTarget::s_virtualScreenSize;
void GLRenderTarget::initStatic()
{
if (GLPlatform::instance()->isGLES()) {
sSupported = true;
s_blitSupported = hasGLVersion(3, 0);
} else {
sSupported = hasGLVersion(3, 0) ||
hasGLExtension(QByteArrayLiteral("GL_ARB_framebuffer_object")) ||
hasGLExtension(QByteArrayLiteral("GL_EXT_framebuffer_object"));
s_blitSupported = hasGLVersion(3, 0) ||
hasGLExtension(QByteArrayLiteral("GL_ARB_framebuffer_object")) ||
hasGLExtension(QByteArrayLiteral("GL_EXT_framebuffer_blit"));
}
}
void GLRenderTarget::cleanup()
{
Q_ASSERT(s_renderTargets.isEmpty());
sSupported = false;
s_blitSupported = false;
}
bool GLRenderTarget::isRenderTargetBound()
{
return !s_renderTargets.isEmpty();
}
bool GLRenderTarget::blitSupported()
{
return s_blitSupported;
}
void GLRenderTarget::pushRenderTarget(GLRenderTarget* target)
{
target->enable();
s_renderTargets.push(target);
}
GLRenderTarget* GLRenderTarget::popRenderTarget()
{
GLRenderTarget* ret = s_renderTargets.pop();
ret->disable();
if (!s_renderTargets.isEmpty()) {
s_renderTargets.top()->enable();
} else {
glViewport (0, 0, s_virtualScreenSize.width(), s_virtualScreenSize.height());
}
return ret;
}
GLRenderTarget::GLRenderTarget(const GLTexture& color)
{
// Reset variables
mValid = false;
mTexture = color;
// Make sure FBO is supported
if (sSupported && !mTexture.isNull()) {
initFBO();
} else
qCCritical(LIBKWINGLUTILS) << "Render targets aren't supported!";
}
GLRenderTarget::~GLRenderTarget()
{
if (mValid) {
glDeleteFramebuffers(1, &mFramebuffer);
}
}
bool GLRenderTarget::enable()
{
if (!valid()) {
qCCritical(LIBKWINGLUTILS) << "Can't enable invalid render target!";
return false;
}
glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
glViewport(0, 0, mTexture.width(), mTexture.height());
mTexture.setDirty();
return true;
}
bool GLRenderTarget::disable()
{
if (!valid()) {
qCCritical(LIBKWINGLUTILS) << "Can't disable invalid render target!";
return false;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
mTexture.setDirty();
return true;
}
static QString formatFramebufferStatus(GLenum status)
{
switch(status) {
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
// An attachment is the wrong type / is invalid / has 0 width or height
return QStringLiteral("GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT");
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
// There are no images attached to the framebuffer
return QStringLiteral("GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT");
case GL_FRAMEBUFFER_UNSUPPORTED:
// A format or the combination of formats of the attachments is unsupported
return QStringLiteral("GL_FRAMEBUFFER_UNSUPPORTED");
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
// Not all attached images have the same width and height
return QStringLiteral("GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT");
case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
// The color attachments don't have the same format
return QStringLiteral("GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT");
case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT:
// The attachments don't have the same number of samples
return QStringLiteral("GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE");
case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
// The draw buffer is missing
return QStringLiteral("GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER");
case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
// The read buffer is missing
return QStringLiteral("GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER");
default:
return QStringLiteral("Unknown (0x") + QString::number(status, 16) + QStringLiteral(")");
}
}
void GLRenderTarget::initFBO()
{
#if DEBUG_GLRENDERTARGET
GLenum err = glGetError();
if (err != GL_NO_ERROR)
qCCritical(LIBKWINGLUTILS) << "Error status when entering GLRenderTarget::initFBO: " << formatGLError(err);
#endif
glGenFramebuffers(1, &mFramebuffer);
#if DEBUG_GLRENDERTARGET
if ((err = glGetError()) != GL_NO_ERROR) {
qCCritical(LIBKWINGLUTILS) << "glGenFramebuffers failed: " << formatGLError(err);
return;
}
#endif
glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
#if DEBUG_GLRENDERTARGET
if ((err = glGetError()) != GL_NO_ERROR) {
qCCritical(LIBKWINGLUTILS) << "glBindFramebuffer failed: " << formatGLError(err);
glDeleteFramebuffers(1, &mFramebuffer);
return;
}
#endif
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
mTexture.target(), mTexture.texture(), 0);
#if DEBUG_GLRENDERTARGET
if ((err = glGetError()) != GL_NO_ERROR) {
qCCritical(LIBKWINGLUTILS) << "glFramebufferTexture2D failed: " << formatGLError(err);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDeleteFramebuffers(1, &mFramebuffer);
return;
}
#endif
const GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
if (status != GL_FRAMEBUFFER_COMPLETE) {
// We have an incomplete framebuffer, consider it invalid
if (status == 0)
qCCritical(LIBKWINGLUTILS) << "glCheckFramebufferStatus failed: " << formatGLError(glGetError());
else
qCCritical(LIBKWINGLUTILS) << "Invalid framebuffer status: " << formatFramebufferStatus(status);
glDeleteFramebuffers(1, &mFramebuffer);
return;
}
mValid = true;
}
void GLRenderTarget::blitFromFramebuffer(const QRect &source, const QRect &destination, GLenum filter)
{
if (!GLRenderTarget::blitSupported()) {
return;
}
GLRenderTarget::pushRenderTarget(this);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, mFramebuffer);
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
const QRect s = source.isNull() ? QRect(0, 0, s_virtualScreenSize.width(), s_virtualScreenSize.height()) : source;
const QRect d = destination.isNull() ? QRect(0, 0, mTexture.width(), mTexture.height()) : destination;
glBlitFramebuffer(s.x(), s_virtualScreenSize.height() - s.y() - s.height(), s.x() + s.width(), s_virtualScreenSize.height() - s.y(),
d.x(), mTexture.height() - d.y() - d.height(), d.x() + d.width(), mTexture.height() - d.y(),
GL_COLOR_BUFFER_BIT, filter);
GLRenderTarget::popRenderTarget();
}
void GLRenderTarget::attachTexture(const GLTexture& target)
{
if (!mValid || mTexture.texture() == target.texture()) {
return;
}
pushRenderTarget(this);
mTexture = target;
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
mTexture.target(), mTexture.texture(), 0);
popRenderTarget();
}
// ------------------------------------------------------------------
static const uint16_t indices[] = {
1, 0, 3, 3, 2, 1, 5, 4, 7, 7, 6, 5, 9, 8, 11, 11, 10, 9,
13, 12, 15, 15, 14, 13, 17, 16, 19, 19, 18, 17, 21, 20, 23, 23, 22, 21,
25, 24, 27, 27, 26, 25, 29, 28, 31, 31, 30, 29, 33, 32, 35, 35, 34, 33,
37, 36, 39, 39, 38, 37, 41, 40, 43, 43, 42, 41, 45, 44, 47, 47, 46, 45,
49, 48, 51, 51, 50, 49, 53, 52, 55, 55, 54, 53, 57, 56, 59, 59, 58, 57,
61, 60, 63, 63, 62, 61, 65, 64, 67, 67, 66, 65, 69, 68, 71, 71, 70, 69,
73, 72, 75, 75, 74, 73, 77, 76, 79, 79, 78, 77, 81, 80, 83, 83, 82, 81,
85, 84, 87, 87, 86, 85, 89, 88, 91, 91, 90, 89, 93, 92, 95, 95, 94, 93,
97, 96, 99, 99, 98, 97, 101, 100, 103, 103, 102, 101, 105, 104, 107, 107, 106, 105,
109, 108, 111, 111, 110, 109, 113, 112, 115, 115, 114, 113, 117, 116, 119, 119, 118, 117,
121, 120, 123, 123, 122, 121, 125, 124, 127, 127, 126, 125, 129, 128, 131, 131, 130, 129,
133, 132, 135, 135, 134, 133, 137, 136, 139, 139, 138, 137, 141, 140, 143, 143, 142, 141,
145, 144, 147, 147, 146, 145, 149, 148, 151, 151, 150, 149, 153, 152, 155, 155, 154, 153,
157, 156, 159, 159, 158, 157, 161, 160, 163, 163, 162, 161, 165, 164, 167, 167, 166, 165,
169, 168, 171, 171, 170, 169, 173, 172, 175, 175, 174, 173, 177, 176, 179, 179, 178, 177,
181, 180, 183, 183, 182, 181, 185, 184, 187, 187, 186, 185, 189, 188, 191, 191, 190, 189,
193, 192, 195, 195, 194, 193, 197, 196, 199, 199, 198, 197, 201, 200, 203, 203, 202, 201,
205, 204, 207, 207, 206, 205, 209, 208, 211, 211, 210, 209, 213, 212, 215, 215, 214, 213,
217, 216, 219, 219, 218, 217, 221, 220, 223, 223, 222, 221, 225, 224, 227, 227, 226, 225,
229, 228, 231, 231, 230, 229, 233, 232, 235, 235, 234, 233, 237, 236, 239, 239, 238, 237,
241, 240, 243, 243, 242, 241, 245, 244, 247, 247, 246, 245, 249, 248, 251, 251, 250, 249,
253, 252, 255, 255, 254, 253, 257, 256, 259, 259, 258, 257, 261, 260, 263, 263, 262, 261,
265, 264, 267, 267, 266, 265, 269, 268, 271, 271, 270, 269, 273, 272, 275, 275, 274, 273,
277, 276, 279, 279, 278, 277, 281, 280, 283, 283, 282, 281, 285, 284, 287, 287, 286, 285,
289, 288, 291, 291, 290, 289, 293, 292, 295, 295, 294, 293, 297, 296, 299, 299, 298, 297,
301, 300, 303, 303, 302, 301, 305, 304, 307, 307, 306, 305, 309, 308, 311, 311, 310, 309,
313, 312, 315, 315, 314, 313, 317, 316, 319, 319, 318, 317, 321, 320, 323, 323, 322, 321,
325, 324, 327, 327, 326, 325, 329, 328, 331, 331, 330, 329, 333, 332, 335, 335, 334, 333,
337, 336, 339, 339, 338, 337, 341, 340, 343, 343, 342, 341, 345, 344, 347, 347, 346, 345,
349, 348, 351, 351, 350, 349, 353, 352, 355, 355, 354, 353, 357, 356, 359, 359, 358, 357,
361, 360, 363, 363, 362, 361, 365, 364, 367, 367, 366, 365, 369, 368, 371, 371, 370, 369,
373, 372, 375, 375, 374, 373, 377, 376, 379, 379, 378, 377, 381, 380, 383, 383, 382, 381,
385, 384, 387, 387, 386, 385, 389, 388, 391, 391, 390, 389, 393, 392, 395, 395, 394, 393,
397, 396, 399, 399, 398, 397, 401, 400, 403, 403, 402, 401, 405, 404, 407, 407, 406, 405,
409, 408, 411, 411, 410, 409, 413, 412, 415, 415, 414, 413, 417, 416, 419, 419, 418, 417,
421, 420, 423, 423, 422, 421, 425, 424, 427, 427, 426, 425, 429, 428, 431, 431, 430, 429,
433, 432, 435, 435, 434, 433, 437, 436, 439, 439, 438, 437, 441, 440, 443, 443, 442, 441,
445, 444, 447, 447, 446, 445, 449, 448, 451, 451, 450, 449, 453, 452, 455, 455, 454, 453,
457, 456, 459, 459, 458, 457, 461, 460, 463, 463, 462, 461, 465, 464, 467, 467, 466, 465,
469, 468, 471, 471, 470, 469, 473, 472, 475, 475, 474, 473, 477, 476, 479, 479, 478, 477,
481, 480, 483, 483, 482, 481, 485, 484, 487, 487, 486, 485, 489, 488, 491, 491, 490, 489,
493, 492, 495, 495, 494, 493, 497, 496, 499, 499, 498, 497, 501, 500, 503, 503, 502, 501,
505, 504, 507, 507, 506, 505, 509, 508, 511, 511, 510, 509, 513, 512, 515, 515, 514, 513,
517, 516, 519, 519, 518, 517, 521, 520, 523, 523, 522, 521, 525, 524, 527, 527, 526, 525,
529, 528, 531, 531, 530, 529, 533, 532, 535, 535, 534, 533, 537, 536, 539, 539, 538, 537,
541, 540, 543, 543, 542, 541, 545, 544, 547, 547, 546, 545, 549, 548, 551, 551, 550, 549,
553, 552, 555, 555, 554, 553, 557, 556, 559, 559, 558, 557, 561, 560, 563, 563, 562, 561,
565, 564, 567, 567, 566, 565, 569, 568, 571, 571, 570, 569, 573, 572, 575, 575, 574, 573,
577, 576, 579, 579, 578, 577, 581, 580, 583, 583, 582, 581, 585, 584, 587, 587, 586, 585,
589, 588, 591, 591, 590, 589, 593, 592, 595, 595, 594, 593, 597, 596, 599, 599, 598, 597,
601, 600, 603, 603, 602, 601, 605, 604, 607, 607, 606, 605, 609, 608, 611, 611, 610, 609,
613, 612, 615, 615, 614, 613, 617, 616, 619, 619, 618, 617, 621, 620, 623, 623, 622, 621,
625, 624, 627, 627, 626, 625, 629, 628, 631, 631, 630, 629, 633, 632, 635, 635, 634, 633,
637, 636, 639, 639, 638, 637, 641, 640, 643, 643, 642, 641, 645, 644, 647, 647, 646, 645,
649, 648, 651, 651, 650, 649, 653, 652, 655, 655, 654, 653, 657, 656, 659, 659, 658, 657,
661, 660, 663, 663, 662, 661, 665, 664, 667, 667, 666, 665, 669, 668, 671, 671, 670, 669,
673, 672, 675, 675, 674, 673, 677, 676, 679, 679, 678, 677, 681, 680, 683, 683, 682, 681,
685, 684, 687, 687, 686, 685, 689, 688, 691, 691, 690, 689, 693, 692, 695, 695, 694, 693,
697, 696, 699, 699, 698, 697, 701, 700, 703, 703, 702, 701, 705, 704, 707, 707, 706, 705,
709, 708, 711, 711, 710, 709, 713, 712, 715, 715, 714, 713, 717, 716, 719, 719, 718, 717,
721, 720, 723, 723, 722, 721, 725, 724, 727, 727, 726, 725, 729, 728, 731, 731, 730, 729,
733, 732, 735, 735, 734, 733, 737, 736, 739, 739, 738, 737, 741, 740, 743, 743, 742, 741,
745, 744, 747, 747, 746, 745, 749, 748, 751, 751, 750, 749, 753, 752, 755, 755, 754, 753,
757, 756, 759, 759, 758, 757, 761, 760, 763, 763, 762, 761, 765, 764, 767, 767, 766, 765,
769, 768, 771, 771, 770, 769, 773, 772, 775, 775, 774, 773, 777, 776, 779, 779, 778, 777,
781, 780, 783, 783, 782, 781, 785, 784, 787, 787, 786, 785, 789, 788, 791, 791, 790, 789,
793, 792, 795, 795, 794, 793, 797, 796, 799, 799, 798, 797, 801, 800, 803, 803, 802, 801,
805, 804, 807, 807, 806, 805, 809, 808, 811, 811, 810, 809, 813, 812, 815, 815, 814, 813,
817, 816, 819, 819, 818, 817, 821, 820, 823, 823, 822, 821, 825, 824, 827, 827, 826, 825,
829, 828, 831, 831, 830, 829, 833, 832, 835, 835, 834, 833, 837, 836, 839, 839, 838, 837,
841, 840, 843, 843, 842, 841, 845, 844, 847, 847, 846, 845, 849, 848, 851, 851, 850, 849,
853, 852, 855, 855, 854, 853, 857, 856, 859, 859, 858, 857, 861, 860, 863, 863, 862, 861,
865, 864, 867, 867, 866, 865, 869, 868, 871, 871, 870, 869, 873, 872, 875, 875, 874, 873,
877, 876, 879, 879, 878, 877, 881, 880, 883, 883, 882, 881, 885, 884, 887, 887, 886, 885,
889, 888, 891, 891, 890, 889, 893, 892, 895, 895, 894, 893, 897, 896, 899, 899, 898, 897,
901, 900, 903, 903, 902, 901, 905, 904, 907, 907, 906, 905, 909, 908, 911, 911, 910, 909,
913, 912, 915, 915, 914, 913, 917, 916, 919, 919, 918, 917, 921, 920, 923, 923, 922, 921,
925, 924, 927, 927, 926, 925, 929, 928, 931, 931, 930, 929, 933, 932, 935, 935, 934, 933,
937, 936, 939, 939, 938, 937, 941, 940, 943, 943, 942, 941, 945, 944, 947, 947, 946, 945,
949, 948, 951, 951, 950, 949, 953, 952, 955, 955, 954, 953, 957, 956, 959, 959, 958, 957,
961, 960, 963, 963, 962, 961, 965, 964, 967, 967, 966, 965, 969, 968, 971, 971, 970, 969,
973, 972, 975, 975, 974, 973, 977, 976, 979, 979, 978, 977, 981, 980, 983, 983, 982, 981,
985, 984, 987, 987, 986, 985, 989, 988, 991, 991, 990, 989, 993, 992, 995, 995, 994, 993,
997, 996, 999, 999, 998, 997, 1001, 1000, 1003, 1003, 1002, 1001, 1005, 1004, 1007, 1007, 1006, 1005,
1009, 1008, 1011, 1011, 1010, 1009, 1013, 1012, 1015, 1015, 1014, 1013, 1017, 1016, 1019, 1019, 1018, 1017,
1021, 1020, 1023, 1023, 1022, 1021, 1025, 1024, 1027, 1027, 1026, 1025, 1029, 1028, 1031, 1031, 1030, 1029,
1033, 1032, 1035, 1035, 1034, 1033, 1037, 1036, 1039, 1039, 1038, 1037, 1041, 1040, 1043, 1043, 1042, 1041,
1045, 1044, 1047, 1047, 1046, 1045, 1049, 1048, 1051, 1051, 1050, 1049, 1053, 1052, 1055, 1055, 1054, 1053,
1057, 1056, 1059, 1059, 1058, 1057, 1061, 1060, 1063, 1063, 1062, 1061, 1065, 1064, 1067, 1067, 1066, 1065,
1069, 1068, 1071, 1071, 1070, 1069, 1073, 1072, 1075, 1075, 1074, 1073, 1077, 1076, 1079, 1079, 1078, 1077,
1081, 1080, 1083, 1083, 1082, 1081, 1085, 1084, 1087, 1087, 1086, 1085, 1089, 1088, 1091, 1091, 1090, 1089,
1093, 1092, 1095, 1095, 1094, 1093, 1097, 1096, 1099, 1099, 1098, 1097, 1101, 1100, 1103, 1103, 1102, 1101,
1105, 1104, 1107, 1107, 1106, 1105, 1109, 1108, 1111, 1111, 1110, 1109, 1113, 1112, 1115, 1115, 1114, 1113,
1117, 1116, 1119, 1119, 1118, 1117, 1121, 1120, 1123, 1123, 1122, 1121, 1125, 1124, 1127, 1127, 1126, 1125,
1129, 1128, 1131, 1131, 1130, 1129, 1133, 1132, 1135, 1135, 1134, 1133, 1137, 1136, 1139, 1139, 1138, 1137,
1141, 1140, 1143, 1143, 1142, 1141, 1145, 1144, 1147, 1147, 1146, 1145, 1149, 1148, 1151, 1151, 1150, 1149,
1153, 1152, 1155, 1155, 1154, 1153, 1157, 1156, 1159, 1159, 1158, 1157, 1161, 1160, 1163, 1163, 1162, 1161,
1165, 1164, 1167, 1167, 1166, 1165, 1169, 1168, 1171, 1171, 1170, 1169, 1173, 1172, 1175, 1175, 1174, 1173,
1177, 1176, 1179, 1179, 1178, 1177, 1181, 1180, 1183, 1183, 1182, 1181, 1185, 1184, 1187, 1187, 1186, 1185,
1189, 1188, 1191, 1191, 1190, 1189, 1193, 1192, 1195, 1195, 1194, 1193, 1197, 1196, 1199, 1199, 1198, 1197,
1201, 1200, 1203, 1203, 1202, 1201, 1205, 1204, 1207, 1207, 1206, 1205, 1209, 1208, 1211, 1211, 1210, 1209,
1213, 1212, 1215, 1215, 1214, 1213, 1217, 1216, 1219, 1219, 1218, 1217, 1221, 1220, 1223, 1223, 1222, 1221,
1225, 1224, 1227, 1227, 1226, 1225, 1229, 1228, 1231, 1231, 1230, 1229, 1233, 1232, 1235, 1235, 1234, 1233,
1237, 1236, 1239, 1239, 1238, 1237, 1241, 1240, 1243, 1243, 1242, 1241, 1245, 1244, 1247, 1247, 1246, 1245,
1249, 1248, 1251, 1251, 1250, 1249, 1253, 1252, 1255, 1255, 1254, 1253, 1257, 1256, 1259, 1259, 1258, 1257,
1261, 1260, 1263, 1263, 1262, 1261, 1265, 1264, 1267, 1267, 1266, 1265, 1269, 1268, 1271, 1271, 1270, 1269,
1273, 1272, 1275, 1275, 1274, 1273, 1277, 1276, 1279, 1279, 1278, 1277, 1281, 1280, 1283, 1283, 1282, 1281,
1285, 1284, 1287, 1287, 1286, 1285, 1289, 1288, 1291, 1291, 1290, 1289, 1293, 1292, 1295, 1295, 1294, 1293,
1297, 1296, 1299, 1299, 1298, 1297, 1301, 1300, 1303, 1303, 1302, 1301, 1305, 1304, 1307, 1307, 1306, 1305,
1309, 1308, 1311, 1311, 1310, 1309, 1313, 1312, 1315, 1315, 1314, 1313, 1317, 1316, 1319, 1319, 1318, 1317,
1321, 1320, 1323, 1323, 1322, 1321, 1325, 1324, 1327, 1327, 1326, 1325, 1329, 1328, 1331, 1331, 1330, 1329,
1333, 1332, 1335, 1335, 1334, 1333, 1337, 1336, 1339, 1339, 1338, 1337, 1341, 1340, 1343, 1343, 1342, 1341,
1345, 1344, 1347, 1347, 1346, 1345, 1349, 1348, 1351, 1351, 1350, 1349, 1353, 1352, 1355, 1355, 1354, 1353,
1357, 1356, 1359, 1359, 1358, 1357, 1361, 1360, 1363, 1363, 1362, 1361, 1365, 1364, 1367, 1367, 1366, 1365,
1369, 1368, 1371, 1371, 1370, 1369, 1373, 1372, 1375, 1375, 1374, 1373, 1377, 1376, 1379, 1379, 1378, 1377,
1381, 1380, 1383, 1383, 1382, 1381, 1385, 1384, 1387, 1387, 1386, 1385, 1389, 1388, 1391, 1391, 1390, 1389,
1393, 1392, 1395, 1395, 1394, 1393, 1397, 1396, 1399, 1399, 1398, 1397, 1401, 1400, 1403, 1403, 1402, 1401,
1405, 1404, 1407, 1407, 1406, 1405, 1409, 1408, 1411, 1411, 1410, 1409, 1413, 1412, 1415, 1415, 1414, 1413,
1417, 1416, 1419, 1419, 1418, 1417, 1421, 1420, 1423, 1423, 1422, 1421, 1425, 1424, 1427, 1427, 1426, 1425,
1429, 1428, 1431, 1431, 1430, 1429, 1433, 1432, 1435, 1435, 1434, 1433, 1437, 1436, 1439, 1439, 1438, 1437,
1441, 1440, 1443, 1443, 1442, 1441, 1445, 1444, 1447, 1447, 1446, 1445, 1449, 1448, 1451, 1451, 1450, 1449,
1453, 1452, 1455, 1455, 1454, 1453, 1457, 1456, 1459, 1459, 1458, 1457, 1461, 1460, 1463, 1463, 1462, 1461,
1465, 1464, 1467, 1467, 1466, 1465, 1469, 1468, 1471, 1471, 1470, 1469, 1473, 1472, 1475, 1475, 1474, 1473,
1477, 1476, 1479, 1479, 1478, 1477, 1481, 1480, 1483, 1483, 1482, 1481, 1485, 1484, 1487, 1487, 1486, 1485,
1489, 1488, 1491, 1491, 1490, 1489, 1493, 1492, 1495, 1495, 1494, 1493, 1497, 1496, 1499, 1499, 1498, 1497,
1501, 1500, 1503, 1503, 1502, 1501, 1505, 1504, 1507, 1507, 1506, 1505, 1509, 1508, 1511, 1511, 1510, 1509,
1513, 1512, 1515, 1515, 1514, 1513, 1517, 1516, 1519, 1519, 1518, 1517, 1521, 1520, 1523, 1523, 1522, 1521,
1525, 1524, 1527, 1527, 1526, 1525, 1529, 1528, 1531, 1531, 1530, 1529, 1533, 1532, 1535, 1535, 1534, 1533,
1537, 1536, 1539, 1539, 1538, 1537, 1541, 1540, 1543, 1543, 1542, 1541, 1545, 1544, 1547, 1547, 1546, 1545,
1549, 1548, 1551, 1551, 1550, 1549, 1553, 1552, 1555, 1555, 1554, 1553, 1557, 1556, 1559, 1559, 1558, 1557,
1561, 1560, 1563, 1563, 1562, 1561, 1565, 1564, 1567, 1567, 1566, 1565, 1569, 1568, 1571, 1571, 1570, 1569,
1573, 1572, 1575, 1575, 1574, 1573, 1577, 1576, 1579, 1579, 1578, 1577, 1581, 1580, 1583, 1583, 1582, 1581,
1585, 1584, 1587, 1587, 1586, 1585, 1589, 1588, 1591, 1591, 1590, 1589, 1593, 1592, 1595, 1595, 1594, 1593,
1597, 1596, 1599, 1599, 1598, 1597, 1601, 1600, 1603, 1603, 1602, 1601, 1605, 1604, 1607, 1607, 1606, 1605,
1609, 1608, 1611, 1611, 1610, 1609, 1613, 1612, 1615, 1615, 1614, 1613, 1617, 1616, 1619, 1619, 1618, 1617,
1621, 1620, 1623, 1623, 1622, 1621, 1625, 1624, 1627, 1627, 1626, 1625, 1629, 1628, 1631, 1631, 1630, 1629,
1633, 1632, 1635, 1635, 1634, 1633, 1637, 1636, 1639, 1639, 1638, 1637, 1641, 1640, 1643, 1643, 1642, 1641,
1645, 1644, 1647, 1647, 1646, 1645, 1649, 1648, 1651, 1651, 1650, 1649, 1653, 1652, 1655, 1655, 1654, 1653,
1657, 1656, 1659, 1659, 1658, 1657, 1661, 1660, 1663, 1663, 1662, 1661, 1665, 1664, 1667, 1667, 1666, 1665,
1669, 1668, 1671, 1671, 1670, 1669, 1673, 1672, 1675, 1675, 1674, 1673, 1677, 1676, 1679, 1679, 1678, 1677,
1681, 1680, 1683, 1683, 1682, 1681, 1685, 1684, 1687, 1687, 1686, 1685, 1689, 1688, 1691, 1691, 1690, 1689,
1693, 1692, 1695, 1695, 1694, 1693, 1697, 1696, 1699, 1699, 1698, 1697, 1701, 1700, 1703, 1703, 1702, 1701,
1705, 1704, 1707, 1707, 1706, 1705, 1709, 1708, 1711, 1711, 1710, 1709, 1713, 1712, 1715, 1715, 1714, 1713,
1717, 1716, 1719, 1719, 1718, 1717, 1721, 1720, 1723, 1723, 1722, 1721, 1725, 1724, 1727, 1727, 1726, 1725,
1729, 1728, 1731, 1731, 1730, 1729, 1733, 1732, 1735, 1735, 1734, 1733, 1737, 1736, 1739, 1739, 1738, 1737,
1741, 1740, 1743, 1743, 1742, 1741, 1745, 1744, 1747, 1747, 1746, 1745, 1749, 1748, 1751, 1751, 1750, 1749,
1753, 1752, 1755, 1755, 1754, 1753, 1757, 1756, 1759, 1759, 1758, 1757, 1761, 1760, 1763, 1763, 1762, 1761,
1765, 1764, 1767, 1767, 1766, 1765, 1769, 1768, 1771, 1771, 1770, 1769, 1773, 1772, 1775, 1775, 1774, 1773,
1777, 1776, 1779, 1779, 1778, 1777, 1781, 1780, 1783, 1783, 1782, 1781, 1785, 1784, 1787, 1787, 1786, 1785,
1789, 1788, 1791, 1791, 1790, 1789, 1793, 1792, 1795, 1795, 1794, 1793, 1797, 1796, 1799, 1799, 1798, 1797,
1801, 1800, 1803, 1803, 1802, 1801, 1805, 1804, 1807, 1807, 1806, 1805, 1809, 1808, 1811, 1811, 1810, 1809,
1813, 1812, 1815, 1815, 1814, 1813, 1817, 1816, 1819, 1819, 1818, 1817, 1821, 1820, 1823, 1823, 1822, 1821,
1825, 1824, 1827, 1827, 1826, 1825, 1829, 1828, 1831, 1831, 1830, 1829, 1833, 1832, 1835, 1835, 1834, 1833,
1837, 1836, 1839, 1839, 1838, 1837, 1841, 1840, 1843, 1843, 1842, 1841, 1845, 1844, 1847, 1847, 1846, 1845,
1849, 1848, 1851, 1851, 1850, 1849, 1853, 1852, 1855, 1855, 1854, 1853, 1857, 1856, 1859, 1859, 1858, 1857,
1861, 1860, 1863, 1863, 1862, 1861, 1865, 1864, 1867, 1867, 1866, 1865, 1869, 1868, 1871, 1871, 1870, 1869,
1873, 1872, 1875, 1875, 1874, 1873, 1877, 1876, 1879, 1879, 1878, 1877, 1881, 1880, 1883, 1883, 1882, 1881,
1885, 1884, 1887, 1887, 1886, 1885, 1889, 1888, 1891, 1891, 1890, 1889, 1893, 1892, 1895, 1895, 1894, 1893,
1897, 1896, 1899, 1899, 1898, 1897, 1901, 1900, 1903, 1903, 1902, 1901, 1905, 1904, 1907, 1907, 1906, 1905,
1909, 1908, 1911, 1911, 1910, 1909, 1913, 1912, 1915, 1915, 1914, 1913, 1917, 1916, 1919, 1919, 1918, 1917,
1921, 1920, 1923, 1923, 1922, 1921, 1925, 1924, 1927, 1927, 1926, 1925, 1929, 1928, 1931, 1931, 1930, 1929,
1933, 1932, 1935, 1935, 1934, 1933, 1937, 1936, 1939, 1939, 1938, 1937, 1941, 1940, 1943, 1943, 1942, 1941,
1945, 1944, 1947, 1947, 1946, 1945, 1949, 1948, 1951, 1951, 1950, 1949, 1953, 1952, 1955, 1955, 1954, 1953,
1957, 1956, 1959, 1959, 1958, 1957, 1961, 1960, 1963, 1963, 1962, 1961, 1965, 1964, 1967, 1967, 1966, 1965,
1969, 1968, 1971, 1971, 1970, 1969, 1973, 1972, 1975, 1975, 1974, 1973, 1977, 1976, 1979, 1979, 1978, 1977,
1981, 1980, 1983, 1983, 1982, 1981, 1985, 1984, 1987, 1987, 1986, 1985, 1989, 1988, 1991, 1991, 1990, 1989,
1993, 1992, 1995, 1995, 1994, 1993, 1997, 1996, 1999, 1999, 1998, 1997, 2001, 2000, 2003, 2003, 2002, 2001,
2005, 2004, 2007, 2007, 2006, 2005, 2009, 2008, 2011, 2011, 2010, 2009, 2013, 2012, 2015, 2015, 2014, 2013,
2017, 2016, 2019, 2019, 2018, 2017, 2021, 2020, 2023, 2023, 2022, 2021, 2025, 2024, 2027, 2027, 2026, 2025,
2029, 2028, 2031, 2031, 2030, 2029, 2033, 2032, 2035, 2035, 2034, 2033, 2037, 2036, 2039, 2039, 2038, 2037,
2041, 2040, 2043, 2043, 2042, 2041, 2045, 2044, 2047, 2047, 2046, 2045
};
template <typename T>
T align(T value, int bytes)
{
return (value + bytes - 1) & ~T(bytes - 1);
}
class IndexBuffer
{
public:
IndexBuffer();
~IndexBuffer();
void accomodate(int count);
void bind();
private:
GLuint m_buffer;
size_t m_size;
int m_count;
};
IndexBuffer::IndexBuffer()
{
// The maximum number of quads we can render with 16 bit indices is 16,384.
// But we start with 512 and grow the buffer as needed.
m_size = sizeof(indices);
m_count = m_size / (6 * sizeof(uint16_t));
glGenBuffers(1, &m_buffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
}
IndexBuffer::~IndexBuffer()
{
glDeleteBuffers(1, &m_buffer);
}
void IndexBuffer::accomodate(int count)
{
// Check if we need to grow the buffer.
if (count <= m_count)
return;
count = align(count, 128);
size_t size = 6 * sizeof(uint16_t) * count;
// Create a new buffer object
GLuint buffer;
glGenBuffers(1, &buffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, nullptr, GL_STATIC_DRAW);
// Use the GPU to copy the data from the old object to the new object,
glBindBuffer(GL_COPY_READ_BUFFER, m_buffer);
glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_ELEMENT_ARRAY_BUFFER, 0, 0, m_size);
glDeleteBuffers(1, &m_buffer);
glFlush(); // Needed to work around what appears to be a CP DMA issue in r600g
// Map the new object and fill in the uninitialized section
const GLbitfield access = GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT | GL_MAP_INVALIDATE_RANGE_BIT;
uint16_t *map = (uint16_t *) glMapBufferRange(GL_ELEMENT_ARRAY_BUFFER, m_size, size - m_size, access);
const uint16_t index[] = { 1, 0, 3, 3, 2, 1 };
for (int i = m_count; i < count; i++) {
for (int j = 0; j < 6; j++)
*(map++) = i * 4 + index[j];
}
glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
m_buffer = buffer;
m_count = count;
m_size = size;
}
void IndexBuffer::bind()
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
}
// ------------------------------------------------------------------
class BitRef
{
public:
BitRef(uint32_t &bitfield, int bit) : m_bitfield(bitfield), m_mask(1 << bit) {}
void operator = (bool val) {
if (val)
m_bitfield |= m_mask;
else
m_bitfield &= ~m_mask;
}
operator bool () const { return m_bitfield & m_mask; }
private:
uint32_t &m_bitfield;
int const m_mask;
};
// ------------------------------------------------------------------
class Bitfield
{
public:
Bitfield() : m_bitfield(0) {}
Bitfield(uint32_t bits) : m_bitfield(bits) {}
void set(int i) { m_bitfield |= (1 << i); }
void clear(int i) { m_bitfield &= ~(1 << i); }
BitRef operator [] (int i) { return BitRef(m_bitfield, i); }
operator uint32_t () const { return m_bitfield; }
private:
uint32_t m_bitfield;
};
// ------------------------------------------------------------------
class BitfieldIterator
{
public:
BitfieldIterator(uint32_t bitfield) : m_bitfield(bitfield) {}
bool hasNext() const { return m_bitfield != 0; }
int next() {
const int bit = ffs(m_bitfield) - 1;
m_bitfield ^= (1 << bit);
return bit;
}
private:
uint32_t m_bitfield;
};
// ------------------------------------------------------------------
struct VertexAttrib
{
int size;
GLenum type;
int offset;
};
// ------------------------------------------------------------------
struct BufferFence
{
GLsync sync;
intptr_t nextEnd;
bool signaled() const
{
GLint value;
glGetSynciv(sync, GL_SYNC_STATUS, 1, nullptr, &value);
return value == GL_SIGNALED;
}
};
static void deleteAll(std::deque<BufferFence> &fences)
{
for (const BufferFence &fence : fences)
glDeleteSync(fence.sync);
fences.clear();
}
// ------------------------------------------------------------------
template <size_t Count>
struct FrameSizesArray
{
public:
FrameSizesArray() {
m_array.fill(0);
}
void push(size_t size) {
m_array[m_index] = size;
m_index = (m_index + 1) % Count;
}
size_t average() const {
size_t sum = 0;
for (size_t size : m_array)
sum += size;
return sum / Count;
}
private:
std::array<size_t, Count> m_array;
int m_index = 0;
};
//*********************************
// GLVertexBufferPrivate
//*********************************
class GLVertexBufferPrivate
{
public:
GLVertexBufferPrivate(GLVertexBuffer::UsageHint usageHint)
: vertexCount(0)
, persistent(false)
, useColor(false)
, color(0, 0, 0, 255)
, bufferSize(0)
, bufferEnd(0)
, mappedSize(0)
, frameSize(0)
, nextOffset(0)
, baseAddress(0)
, map(nullptr)
{
glGenBuffers(1, &buffer);
switch(usageHint) {
case GLVertexBuffer::Dynamic:
usage = GL_DYNAMIC_DRAW;
break;
case GLVertexBuffer::Static:
usage = GL_STATIC_DRAW;
break;
default:
usage = GL_STREAM_DRAW;
break;
}
}
~GLVertexBufferPrivate() {
deleteAll(fences);
if (buffer != 0) {
glDeleteBuffers(1, &buffer);
map = nullptr;
}
}
void interleaveArrays(float *array, int dim, const float *vertices, const float *texcoords, int count);
void bindArrays();
void unbindArrays();
void reallocateBuffer(size_t size);
GLvoid *mapNextFreeRange(size_t size);
void reallocatePersistentBuffer(size_t size);
bool awaitFence(intptr_t offset);
GLvoid *getIdleRange(size_t size);
GLuint buffer;
GLenum usage;
int stride;
int vertexCount;
static GLVertexBuffer *streamingBuffer;
static bool haveBufferStorage;
static bool haveSyncFences;
static bool hasMapBufferRange;
static bool supportsIndexedQuads;
QByteArray dataStore;
bool persistent;
bool useColor;
QVector4D color;
size_t bufferSize;
intptr_t bufferEnd;
size_t mappedSize;
size_t frameSize;
intptr_t nextOffset;
intptr_t baseAddress;
uint8_t *map;
std::deque<BufferFence> fences;
FrameSizesArray<4> frameSizes;
VertexAttrib attrib[VertexAttributeCount];
Bitfield enabledArrays;
static IndexBuffer *s_indexBuffer;
};
bool GLVertexBufferPrivate::hasMapBufferRange = false;
bool GLVertexBufferPrivate::supportsIndexedQuads = false;
GLVertexBuffer *GLVertexBufferPrivate::streamingBuffer = nullptr;
bool GLVertexBufferPrivate::haveBufferStorage = false;
bool GLVertexBufferPrivate::haveSyncFences = false;
IndexBuffer *GLVertexBufferPrivate::s_indexBuffer = nullptr;
void GLVertexBufferPrivate::interleaveArrays(float *dst, int dim,
const float *vertices, const float *texcoords,
int count)
{
if (!texcoords) {
memcpy((void *) dst, vertices, dim * sizeof(float) * count);
return;
}
switch (dim)
{
case 2:
for (int i = 0; i < count; i++) {
*(dst++) = *(vertices++);
*(dst++) = *(vertices++);
*(dst++) = *(texcoords++);
*(dst++) = *(texcoords++);
}
break;
case 3:
for (int i = 0; i < count; i++) {
*(dst++) = *(vertices++);
*(dst++) = *(vertices++);
*(dst++) = *(vertices++);
*(dst++) = *(texcoords++);
*(dst++) = *(texcoords++);
}
break;
default:
for (int i = 0; i < count; i++) {
for (int j = 0; j < dim; j++)
*(dst++) = *(vertices++);
*(dst++) = *(texcoords++);
*(dst++) = *(texcoords++);
}
}
}
void GLVertexBufferPrivate::bindArrays()
{
if (useColor) {
GLShader *shader = ShaderManager::instance()->getBoundShader();
shader->setUniform(GLShader::Color, color);
}
glBindBuffer(GL_ARRAY_BUFFER, buffer);
BitfieldIterator it(enabledArrays);
while (it.hasNext()) {
const int index = it.next();
glVertexAttribPointer(index, attrib[index].size, attrib[index].type, GL_FALSE, stride,
(const GLvoid *) (baseAddress + attrib[index].offset));
glEnableVertexAttribArray(index);
}
}
void GLVertexBufferPrivate::unbindArrays()
{
BitfieldIterator it(enabledArrays);
while (it.hasNext())
glDisableVertexAttribArray(it.next());
}
void GLVertexBufferPrivate::reallocatePersistentBuffer(size_t size)
{
if (buffer != 0) {
// This also unmaps and unbinds the buffer
glDeleteBuffers(1, &buffer);
buffer = 0;
deleteAll(fences);
}
if (buffer == 0)
glGenBuffers(1, &buffer);
// Round the size up to 64 kb
size_t minSize = qMax<size_t>(frameSizes.average() * 3, 128 * 1024);
bufferSize = align(qMax(size, minSize), 64 * 1024);
const GLbitfield storage = GL_DYNAMIC_STORAGE_BIT;
const GLbitfield access = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT;
glBindBuffer(GL_ARRAY_BUFFER, buffer);
glBufferStorage(GL_ARRAY_BUFFER, bufferSize, nullptr, storage | access);
map = (uint8_t *) glMapBufferRange(GL_ARRAY_BUFFER, 0, bufferSize, access);
nextOffset = 0;
bufferEnd = bufferSize;
}
bool GLVertexBufferPrivate::awaitFence(intptr_t end)
{
// Skip fences until we reach the end offset
while (!fences.empty() && fences.front().nextEnd < end) {
glDeleteSync(fences.front().sync);
fences.pop_front();
}
assert(!fences.empty());
// Wait on the next fence
const BufferFence &fence = fences.front();
if (!fence.signaled()) {
qCDebug(LIBKWINGLUTILS) << "Stalling on VBO fence";
const GLenum ret = glClientWaitSync(fence.sync, GL_SYNC_FLUSH_COMMANDS_BIT, 1000000000);
if (ret == GL_TIMEOUT_EXPIRED || ret == GL_WAIT_FAILED) {
qCCritical(LIBKWINGLUTILS) << "Wait failed";
return false;
}
}
glDeleteSync(fence.sync);
// Update the end pointer
bufferEnd = fence.nextEnd;
fences.pop_front();
return true;
}
GLvoid *GLVertexBufferPrivate::getIdleRange(size_t size)
{
if (unlikely(size > bufferSize))
reallocatePersistentBuffer(size * 2);
// Handle wrap-around
if (unlikely(nextOffset + size > bufferSize)) {
nextOffset = 0;
bufferEnd -= bufferSize;
for (BufferFence &fence : fences)
fence.nextEnd -= bufferSize;
// Emit a fence now
BufferFence fence;
fence.sync = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
fence.nextEnd = bufferSize;
fences.emplace_back(fence);
}
if (unlikely(nextOffset + intptr_t(size) > bufferEnd)) {
if (!awaitFence(nextOffset + size))
return nullptr;
}
return map + nextOffset;
}
void GLVertexBufferPrivate::reallocateBuffer(size_t size)
{
// Round the size up to 4 Kb for streaming/dynamic buffers.
const size_t minSize = 32768; // Minimum size for streaming buffers
const size_t alloc = usage != GL_STATIC_DRAW ? align(qMax(size, minSize), 4096) : size;
glBufferData(GL_ARRAY_BUFFER, alloc, 0, usage);
bufferSize = alloc;
}
GLvoid *GLVertexBufferPrivate::mapNextFreeRange(size_t size)
{
GLbitfield access = GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT | GL_MAP_UNSYNCHRONIZED_BIT;
if ((nextOffset + size) > bufferSize) {
// Reallocate the data store if it's too small.
if (size > bufferSize) {
reallocateBuffer(size);
} else {
access |= GL_MAP_INVALIDATE_BUFFER_BIT;
access ^= GL_MAP_UNSYNCHRONIZED_BIT;
}
nextOffset = 0;
}
return glMapBufferRange(GL_ARRAY_BUFFER, nextOffset, size, access);
}
//*********************************
// GLVertexBuffer
//*********************************
QSize GLVertexBuffer::s_virtualScreenSize;
GLVertexBuffer::GLVertexBuffer(UsageHint hint)
: d(new GLVertexBufferPrivate(hint))
{
}
GLVertexBuffer::~GLVertexBuffer()
{
delete d;
}
void GLVertexBuffer::setData(const void *data, size_t size)
{
GLvoid *ptr = map(size);
memcpy(ptr, data, size);
unmap();
}
void GLVertexBuffer::setData(int vertexCount, int dim, const float* vertices, const float* texcoords)
{
const GLVertexAttrib layout[] = {
{ VA_Position, dim, GL_FLOAT, 0 },
{ VA_TexCoord, 2, GL_FLOAT, int(dim * sizeof(float)) }
};
int stride = (texcoords ? dim + 2 : dim) * sizeof(float);
int attribCount = texcoords ? 2 : 1;
setAttribLayout(layout, attribCount, stride);
setVertexCount(vertexCount);
GLvoid *ptr = map(vertexCount * stride);
d->interleaveArrays((float *) ptr, dim, vertices, texcoords, vertexCount);
unmap();
}
GLvoid *GLVertexBuffer::map(size_t size)
{
d->mappedSize = size;
d->frameSize += size;
if (d->persistent)
return d->getIdleRange(size);
glBindBuffer(GL_ARRAY_BUFFER, d->buffer);
bool preferBufferSubData = GLPlatform::instance()->preferBufferSubData();
if (GLVertexBufferPrivate::hasMapBufferRange && !preferBufferSubData)
return (GLvoid *) d->mapNextFreeRange(size);
// If we can't map the buffer we allocate local memory to hold the
// buffer data and return a pointer to it. The data will be submitted
// to the actual buffer object when the user calls unmap().
if (size_t(d->dataStore.size()) < size)
d->dataStore.resize(size);
return (GLvoid *) d->dataStore.data();
}
void GLVertexBuffer::unmap()
{
if (d->persistent) {
d->baseAddress = d->nextOffset;
d->nextOffset += align(d->mappedSize, 16); // Align to 16 bytes for SSE
d->mappedSize = 0;
return;
}
bool preferBufferSubData = GLPlatform::instance()->preferBufferSubData();
if (GLVertexBufferPrivate::hasMapBufferRange && !preferBufferSubData) {
glUnmapBuffer(GL_ARRAY_BUFFER);
d->baseAddress = d->nextOffset;
d->nextOffset += align(d->mappedSize, 16); // Align to 16 bytes for SSE
} else {
// Upload the data from local memory to the buffer object
if (preferBufferSubData) {
if ((d->nextOffset + d->mappedSize) > d->bufferSize) {
d->reallocateBuffer(d->mappedSize);
d->nextOffset = 0;
}
glBufferSubData(GL_ARRAY_BUFFER, d->nextOffset, d->mappedSize, d->dataStore.constData());
d->baseAddress = d->nextOffset;
d->nextOffset += align(d->mappedSize, 16); // Align to 16 bytes for SSE
} else {
glBufferData(GL_ARRAY_BUFFER, d->mappedSize, d->dataStore.data(), d->usage);
d->baseAddress = 0;
}
// Free the local memory buffer if it's unlikely to be used again
if (d->usage == GL_STATIC_DRAW)
d->dataStore = QByteArray();
}
d->mappedSize = 0;
}
void GLVertexBuffer::setVertexCount(int count)
{
d->vertexCount = count;
}
void GLVertexBuffer::setAttribLayout(const GLVertexAttrib *attribs, int count, int stride)
{
// Start by disabling all arrays
d->enabledArrays = 0;
for (int i = 0; i < count; i++) {
const int index = attribs[i].index;
assert(index >= 0 && index < VertexAttributeCount);
assert(!d->enabledArrays[index]);
d->attrib[index].size = attribs[i].size;
d->attrib[index].type = attribs[i].type;
d->attrib[index].offset = attribs[i].relativeOffset;
d->enabledArrays[index] = true;
}
d->stride = stride;
}
void GLVertexBuffer::render(GLenum primitiveMode)
{
render(infiniteRegion(), primitiveMode, false);
}
void GLVertexBuffer::render(const QRegion& region, GLenum primitiveMode, bool hardwareClipping)
{
d->bindArrays();
draw(region, primitiveMode, 0, d->vertexCount, hardwareClipping);
d->unbindArrays();
}
void GLVertexBuffer::bindArrays()
{
d->bindArrays();
}
void GLVertexBuffer::unbindArrays()
{
d->unbindArrays();
}
void GLVertexBuffer::draw(GLenum primitiveMode, int first, int count)
{
draw(infiniteRegion(), primitiveMode, first, count, false);
}
void GLVertexBuffer::draw(const QRegion &region, GLenum primitiveMode, int first, int count, bool hardwareClipping)
{
if (primitiveMode == GL_QUADS) {
IndexBuffer *&indexBuffer = GLVertexBufferPrivate::s_indexBuffer;
if (!indexBuffer)
indexBuffer = new IndexBuffer;
indexBuffer->bind();
indexBuffer->accomodate(count / 4);
count = count * 6 / 4;
if (!hardwareClipping) {
glDrawElementsBaseVertex(GL_TRIANGLES, count, GL_UNSIGNED_SHORT, nullptr, first);
} else {
// Clip using scissoring
foreach (const QRect &r, region.rects()) {
glScissor(r.x(), s_virtualScreenSize.height() - r.y() - r.height(), r.width(), r.height());
glDrawElementsBaseVertex(GL_TRIANGLES, count, GL_UNSIGNED_SHORT, nullptr, first);
}
}
return;
}
if (!hardwareClipping) {
glDrawArrays(primitiveMode, first, count);
} else {
// Clip using scissoring
foreach (const QRect &r, region.rects()) {
glScissor(r.x(), s_virtualScreenSize.height() - r.y() - r.height(), r.width(), r.height());
glDrawArrays(primitiveMode, first, count);
}
}
}
bool GLVertexBuffer::supportsIndexedQuads()
{
return GLVertexBufferPrivate::supportsIndexedQuads;
}
bool GLVertexBuffer::isUseColor() const
{
return d->useColor;
}
void GLVertexBuffer::setUseColor(bool enable)
{
d->useColor = enable;
}
void GLVertexBuffer::setColor(const QColor& color, bool enable)
{
d->useColor = enable;
d->color = QVector4D(color.redF(), color.greenF(), color.blueF(), color.alphaF());
}
void GLVertexBuffer::reset()
{
d->useColor = false;
d->color = QVector4D(0, 0, 0, 1);
d->vertexCount = 0;
}
void GLVertexBuffer::endOfFrame()
{
if (!d->persistent)
return;
// Emit a fence if we have uploaded data
if (d->frameSize > 0) {
d->frameSizes.push(d->frameSize);
d->frameSize = 0;
// Force the buffer to be reallocated at the beginning of the next frame
// if the average frame size is greater than half the size of the buffer
if (unlikely(d->frameSizes.average() > d->bufferSize / 2)) {
deleteAll(d->fences);
glDeleteBuffers(1, &d->buffer);
d->buffer = 0;
d->bufferSize = 0;
d->nextOffset = 0;
d->map = nullptr;
} else {
BufferFence fence;
fence.sync = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
fence.nextEnd = d->nextOffset + d->bufferSize;
d->fences.emplace_back(fence);
}
}
}
void GLVertexBuffer::framePosted()
{
if (!d->persistent)
return;
// Remove finished fences from the list and update the bufferEnd offset
while (d->fences.size() > 1 && d->fences.front().signaled()) {
const BufferFence &fence = d->fences.front();
glDeleteSync(fence.sync);
d->bufferEnd = fence.nextEnd;
d->fences.pop_front();
}
}
void GLVertexBuffer::initStatic()
{
if (GLPlatform::instance()->isGLES()) {
bool haveBaseVertex = hasGLExtension(QByteArrayLiteral("GL_OES_draw_elements_base_vertex"));
bool haveCopyBuffer = hasGLVersion(3, 0);
bool haveMapBufferRange = hasGLExtension(QByteArrayLiteral("GL_EXT_map_buffer_range"));
GLVertexBufferPrivate::hasMapBufferRange = haveMapBufferRange;
GLVertexBufferPrivate::supportsIndexedQuads = haveBaseVertex && haveCopyBuffer && haveMapBufferRange;
GLVertexBufferPrivate::haveBufferStorage = hasGLExtension("GL_EXT_buffer_storage");
GLVertexBufferPrivate::haveSyncFences = hasGLVersion(3, 0);
} else {
bool haveBaseVertex = hasGLVersion(3, 2) || hasGLExtension(QByteArrayLiteral("GL_ARB_draw_elements_base_vertex"));
bool haveCopyBuffer = hasGLVersion(3, 1) || hasGLExtension(QByteArrayLiteral("GL_ARB_copy_buffer"));
bool haveMapBufferRange = hasGLVersion(3, 0) || hasGLExtension(QByteArrayLiteral("GL_ARB_map_buffer_range"));
GLVertexBufferPrivate::hasMapBufferRange = haveMapBufferRange;
GLVertexBufferPrivate::supportsIndexedQuads = haveBaseVertex && haveCopyBuffer && haveMapBufferRange;
GLVertexBufferPrivate::haveBufferStorage = hasGLVersion(4, 4) || hasGLExtension("GL_ARB_buffer_storage");
GLVertexBufferPrivate::haveSyncFences = hasGLVersion(3, 2) || hasGLExtension("GL_ARB_sync");
}
GLVertexBufferPrivate::s_indexBuffer = nullptr;
GLVertexBufferPrivate::streamingBuffer = new GLVertexBuffer(GLVertexBuffer::Stream);
if (GLVertexBufferPrivate::haveBufferStorage && GLVertexBufferPrivate::haveSyncFences) {
if (qgetenv("KWIN_PERSISTENT_VBO") != QByteArrayLiteral("0")) {
GLVertexBufferPrivate::streamingBuffer->d->persistent = true;
}
}
}
void GLVertexBuffer::cleanup()
{
delete GLVertexBufferPrivate::s_indexBuffer;
GLVertexBufferPrivate::s_indexBuffer = nullptr;
GLVertexBufferPrivate::hasMapBufferRange = false;
GLVertexBufferPrivate::supportsIndexedQuads = false;
delete GLVertexBufferPrivate::streamingBuffer;
GLVertexBufferPrivate::streamingBuffer = nullptr;
}
GLVertexBuffer *GLVertexBuffer::streamingBuffer()
{
return GLVertexBufferPrivate::streamingBuffer;
}
} // namespace
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