bb433ac40e
Also slightly redo the #define's for effects, now it's: - #ifdef KWIN_HAVE_COMPOSITING to check whether there's any compositing support at all - #ifdef KWIN_HAVE_OPENGL_COMPOSITING to check for OpenGL-based compositing - #ifdef KWIN_HAVE_XRENDER_COMPOSITING the same for XRender CCMAIL: kwin@kde.org svn path=/trunk/KDE/kdebase/workspace/; revision=749628
979 lines
27 KiB
C++
979 lines
27 KiB
C++
/********************************************************************
|
|
KWin - the KDE window manager
|
|
This file is part of the KDE project.
|
|
|
|
Copyright (C) 2006-2007 Rivo Laks <rivolaks@hot.ee>
|
|
|
|
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"
|
|
|
|
#ifdef KWIN_HAVE_OPENGL
|
|
|
|
#include "kwinglobals.h"
|
|
#include "kwineffects.h"
|
|
|
|
#include "kdebug.h"
|
|
#include <kstandarddirs.h>
|
|
|
|
#include <QPixmap>
|
|
#include <QImage>
|
|
#include <QHash>
|
|
#include <QFile>
|
|
|
|
|
|
|
|
#define MAKE_GL_VERSION(major, minor, release) ( ((major) << 16) | ((minor) << 8) | (release) )
|
|
|
|
|
|
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;
|
|
// List of all supported GL and GLX extensions
|
|
static QStringList glExtensions;
|
|
static QStringList glxExtensions;
|
|
|
|
int glTextureUnitsCount;
|
|
|
|
|
|
// Functions
|
|
void initGLX()
|
|
{
|
|
// Get GLX version
|
|
int major, minor;
|
|
glXQueryVersion( display(), &major, &minor );
|
|
glXVersion = MAKE_GL_VERSION( major, minor, 0 );
|
|
// Get list of supported GLX extensions
|
|
glxExtensions = QString((const char*)glXQueryExtensionsString(
|
|
display(), DefaultScreen( display()))).split(" ");
|
|
|
|
glxResolveFunctions();
|
|
}
|
|
|
|
void initGL()
|
|
{
|
|
// Get OpenGL version
|
|
QString glversionstring = QString((const char*)glGetString(GL_VERSION));
|
|
QStringList glversioninfo = glversionstring.left(glversionstring.indexOf(' ')).split('.');
|
|
glVersion = MAKE_GL_VERSION(glversioninfo[0].toInt(), glversioninfo[1].toInt(),
|
|
glversioninfo.count() > 2 ? glversioninfo[2].toInt() : 0);
|
|
// Get list of supported OpenGL extensions
|
|
glExtensions = QString((const char*)glGetString(GL_EXTENSIONS)).split(" ");
|
|
|
|
// handle OpenGL extensions functions
|
|
glResolveFunctions();
|
|
|
|
GLTexture::initStatic();
|
|
GLShader::initStatic();
|
|
GLRenderTarget::initStatic();
|
|
}
|
|
|
|
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 hasGLExtension(const QString& extension)
|
|
{
|
|
return glExtensions.contains(extension) || glxExtensions.contains(extension);
|
|
}
|
|
|
|
void checkGLError( const char* txt )
|
|
{
|
|
GLenum err = glGetError();
|
|
if( err != GL_NO_ERROR )
|
|
kWarning() << "GL error (" << txt << "): 0x" << QString::number( err, 16 ) ;
|
|
}
|
|
|
|
int nearestPowerOfTwo( int x )
|
|
{
|
|
// This method had been copied from Qt's nearest_gl_texture_size()
|
|
int n = 0, last = 0;
|
|
for (int s = 0; s < 32; ++s) {
|
|
if (((x>>s) & 1) == 1) {
|
|
++n;
|
|
last = s;
|
|
}
|
|
}
|
|
if (n > 1)
|
|
return 1 << (last+1);
|
|
return 1 << last;
|
|
}
|
|
|
|
void renderGLGeometry( int count, const float* vertices, const float* texture, const float* color,
|
|
int dim, int stride )
|
|
{
|
|
return renderGLGeometry( false, QRegion(), count, vertices, texture, color, dim, stride );
|
|
}
|
|
|
|
void renderGLGeometry( int mask, const QRegion& region, int count,
|
|
const float* vertices, const float* texture, const float* color,
|
|
int dim, int stride )
|
|
{
|
|
return renderGLGeometry( !( mask & ( Effect::PAINT_WINDOW_TRANSFORMED | Effect::PAINT_SCREEN_TRANSFORMED )),
|
|
region, count, vertices, texture, color, dim, stride );
|
|
}
|
|
|
|
void renderGLGeometry( bool clip, const QRegion& region, int count,
|
|
const float* vertices, const float* texture, const float* color,
|
|
int dim, int stride )
|
|
{
|
|
// Using arrays only makes sense if we have larger number of vertices.
|
|
// Otherwise overhead of enabling/disabling them is too big.
|
|
bool use_arrays = (count > 5);
|
|
|
|
if( use_arrays )
|
|
{
|
|
glPushAttrib( GL_ENABLE_BIT );
|
|
glPushClientAttrib( GL_CLIENT_VERTEX_ARRAY_BIT );
|
|
// Enable arrays
|
|
glEnableClientState( GL_VERTEX_ARRAY );
|
|
glVertexPointer( dim, GL_FLOAT, stride, vertices );
|
|
if( texture != NULL )
|
|
{
|
|
glEnableClientState( GL_TEXTURE_COORD_ARRAY );
|
|
glTexCoordPointer( 2, GL_FLOAT, stride, texture );
|
|
}
|
|
if( color != NULL )
|
|
{
|
|
glEnableClientState( GL_COLOR_ARRAY );
|
|
glColorPointer( 4, GL_FLOAT, stride, color );
|
|
}
|
|
}
|
|
|
|
// Render
|
|
if( !clip )
|
|
{
|
|
// Just draw the entire window, no clipping
|
|
if( use_arrays )
|
|
glDrawArrays( GL_QUADS, 0, count );
|
|
else
|
|
renderGLGeometryImmediate( count, vertices, texture, color, dim, stride );
|
|
}
|
|
else
|
|
{
|
|
// Make sure there's only a single quad (no transformed vertices)
|
|
// Clip using scissoring
|
|
glEnable( GL_SCISSOR_TEST );
|
|
int dh = displayHeight();
|
|
if( use_arrays )
|
|
{
|
|
foreach( QRect r, region.rects())
|
|
{
|
|
// Scissor rect has to be given in OpenGL coords
|
|
glScissor(r.x(), dh - r.y() - r.height(), r.width(), r.height());
|
|
glDrawArrays( GL_QUADS, 0, count );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
foreach( QRect r, region.rects())
|
|
{
|
|
// Scissor rect has to be given in OpenGL coords
|
|
glScissor(r.x(), dh - r.y() - r.height(), r.width(), r.height());
|
|
renderGLGeometryImmediate( count, vertices, texture, color, dim, stride );
|
|
}
|
|
}
|
|
}
|
|
|
|
if( use_arrays )
|
|
{
|
|
glPopClientAttrib();
|
|
glPopAttrib();
|
|
}
|
|
}
|
|
|
|
void renderGLGeometryImmediate( int count, const float* vertices, const float* texture, const float* color,
|
|
int dim, int stride )
|
|
{
|
|
// Find out correct glVertex*fv function according to dim parameter.
|
|
void ( *glVertexFunc )( const float* ) = glVertex2fv;
|
|
if( dim == 3 )
|
|
glVertexFunc = glVertex3fv;
|
|
else if( dim == 4 )
|
|
glVertexFunc = glVertex4fv;
|
|
|
|
// These are number of _floats_ per item, not _bytes_ per item as opengl uses.
|
|
int vsize, tsize, csize;
|
|
vsize = tsize = csize = stride / sizeof(float);
|
|
if( !stride )
|
|
{
|
|
// 0 means that arrays are tightly packed. This gives us different
|
|
// strides for different arrays
|
|
vsize = dim;
|
|
tsize = 2;
|
|
csize = 4;
|
|
}
|
|
|
|
glBegin( GL_QUADS );
|
|
// This sucks. But makes it faster.
|
|
if( texture && color )
|
|
{
|
|
for( int i = 0; i < count; i++ )
|
|
{
|
|
glTexCoord2fv( texture + i*tsize );
|
|
glColor4fv( color + i*csize );
|
|
glVertexFunc( vertices + i*vsize );
|
|
}
|
|
}
|
|
else if( texture )
|
|
{
|
|
for( int i = 0; i < count; i++ )
|
|
{
|
|
glTexCoord2fv( texture + i*tsize );
|
|
glVertexFunc( vertices + i*vsize );
|
|
}
|
|
}
|
|
else if( color )
|
|
{
|
|
for( int i = 0; i < count; i++ )
|
|
{
|
|
glColor4fv( color + i*csize );
|
|
glVertexFunc( vertices + i*vsize );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for( int i = 0; i < count; i++ )
|
|
glVertexFunc( vertices + i*vsize );
|
|
}
|
|
glEnd();
|
|
}
|
|
|
|
void addQuadVertices(QVector<float>& verts, float x1, float y1, float x2, float y2)
|
|
{
|
|
verts << x1 << y1;
|
|
verts << x1 << y2;
|
|
verts << x2 << y2;
|
|
verts << x2 << y1;
|
|
}
|
|
|
|
void renderRoundBox( const QRect& area, float roundness, GLTexture* texture )
|
|
{
|
|
static GLTexture* circleTexture = 0;
|
|
if( !texture && !circleTexture )
|
|
{
|
|
QString texturefile = KGlobal::dirs()->findResource("data", "kwin/circle.png");
|
|
circleTexture = new GLTexture(texturefile);
|
|
}
|
|
if( !texture )
|
|
{
|
|
texture = circleTexture;
|
|
}
|
|
|
|
glPushAttrib( GL_CURRENT_BIT | GL_ENABLE_BIT | GL_TEXTURE_BIT );
|
|
glEnable( GL_BLEND );
|
|
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
|
|
|
|
glPushMatrix();
|
|
|
|
QVector<float> verts, texcoords;
|
|
verts.reserve(80);
|
|
texcoords.reserve(80);
|
|
// center
|
|
addQuadVertices(verts, area.left() + roundness, area.top() + roundness, area.right() - roundness, area.bottom() - roundness);
|
|
addQuadVertices(texcoords, 0.5, 0.5, 0.5, 0.5);
|
|
// sides
|
|
// left
|
|
addQuadVertices(verts, area.left(), area.top() + roundness, area.left() + roundness, area.bottom() - roundness);
|
|
addQuadVertices(texcoords, 0.0, 0.5, 0.5, 0.5);
|
|
// top
|
|
addQuadVertices(verts, area.left() + roundness, area.top(), area.right() - roundness, area.top() + roundness);
|
|
addQuadVertices(texcoords, 0.5, 0.0, 0.5, 0.5);
|
|
// right
|
|
addQuadVertices(verts, area.right() - roundness, area.top() + roundness, area.right(), area.bottom() - roundness);
|
|
addQuadVertices(texcoords, 0.5, 0.5, 1.0, 0.5);
|
|
// bottom
|
|
addQuadVertices(verts, area.left() + roundness, area.bottom() - roundness, area.right() - roundness, area.bottom());
|
|
addQuadVertices(texcoords, 0.5, 0.5, 0.5, 1.0);
|
|
// corners
|
|
// top-left
|
|
addQuadVertices(verts, area.left(), area.top(), area.left() + roundness, area.top() + roundness);
|
|
addQuadVertices(texcoords, 0.0, 0.0, 0.5, 0.5);
|
|
// top-right
|
|
addQuadVertices(verts, area.right() - roundness, area.top(), area.right(), area.top() + roundness);
|
|
addQuadVertices(texcoords, 0.5, 0.0, 1.0, 0.5);
|
|
// bottom-left
|
|
addQuadVertices(verts, area.left(), area.bottom() - roundness, area.left() + roundness, area.bottom());
|
|
addQuadVertices(texcoords, 0.0, 0.5, 0.5, 1.0);
|
|
// bottom-right
|
|
addQuadVertices(verts, area.right() - roundness, area.bottom() - roundness, area.right(), area.bottom());
|
|
addQuadVertices(texcoords, 0.5, 0.5, 1.0, 1.0);
|
|
|
|
texture->bind();
|
|
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
|
|
// We have two elements per vertex in the verts array
|
|
int verticesCount = verts.count() / 2;
|
|
renderGLGeometry( verticesCount, verts.data(), texcoords.data() );
|
|
texture->unbind();
|
|
|
|
glPopMatrix();
|
|
glPopAttrib();
|
|
}
|
|
|
|
void renderRoundBoxWithEdge( const QRect& area, float roundness )
|
|
{
|
|
static GLTexture* texture = 0;
|
|
if( !texture )
|
|
{
|
|
QString texturefile = KGlobal::dirs()->findResource("data", "kwin/circle-edgy.png");
|
|
texture = new GLTexture(texturefile);
|
|
}
|
|
renderRoundBox( area, roundness, texture );
|
|
}
|
|
|
|
//****************************************
|
|
// GLTexture
|
|
//****************************************
|
|
|
|
bool GLTexture::mNPOTTextureSupported = false;
|
|
bool GLTexture::mFramebufferObjectSupported = false;
|
|
bool GLTexture::mSaturationSupported = false;
|
|
|
|
GLTexture::GLTexture()
|
|
{
|
|
init();
|
|
}
|
|
|
|
GLTexture::GLTexture( const QImage& image, GLenum target )
|
|
{
|
|
init();
|
|
load( image, target );
|
|
}
|
|
|
|
GLTexture::GLTexture( const QPixmap& pixmap, GLenum target )
|
|
{
|
|
init();
|
|
load( pixmap, target );
|
|
}
|
|
|
|
GLTexture::GLTexture( const QString& fileName )
|
|
{
|
|
init();
|
|
load( fileName );
|
|
}
|
|
|
|
GLTexture::GLTexture( int width, int height )
|
|
{
|
|
init();
|
|
|
|
if( NPOTTextureSupported() || ( isPowerOfTwo( width ) && isPowerOfTwo( height )))
|
|
{
|
|
mTarget = GL_TEXTURE_2D;
|
|
mScale.setWidth( 1.0 / width);
|
|
mScale.setHeight( 1.0 / height);
|
|
can_use_mipmaps = true;
|
|
|
|
glGenTextures( 1, &mTexture );
|
|
bind();
|
|
glTexImage2D( mTarget, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
|
|
unbind();
|
|
}
|
|
}
|
|
|
|
GLTexture::~GLTexture()
|
|
{
|
|
discard();
|
|
}
|
|
|
|
void GLTexture::init()
|
|
{
|
|
mTexture = None;
|
|
mTarget = 0;
|
|
mFilter = 0;
|
|
y_inverted = false;
|
|
can_use_mipmaps = false;
|
|
has_valid_mipmaps = false;
|
|
}
|
|
|
|
void GLTexture::initStatic()
|
|
{
|
|
mNPOTTextureSupported = hasGLExtension( "GL_ARB_texture_non_power_of_two" );
|
|
mFramebufferObjectSupported = hasGLExtension( "GL_EXT_framebuffer_object" );
|
|
mSaturationSupported = ((hasGLExtension("GL_ARB_texture_env_crossbar")
|
|
&& hasGLExtension("GL_ARB_texture_env_dot3")) || hasGLVersion(1, 4))
|
|
&& (glTextureUnitsCount >= 4) && glActiveTexture != NULL;
|
|
}
|
|
|
|
bool GLTexture::isNull() const
|
|
{
|
|
return mTexture == None;
|
|
}
|
|
|
|
bool GLTexture::load( const QImage& image, GLenum target )
|
|
{
|
|
if( image.isNull())
|
|
return false;
|
|
QImage img = image;
|
|
mTarget = target;
|
|
if( mTarget != GL_TEXTURE_RECTANGLE_ARB )
|
|
{
|
|
if( !NPOTTextureSupported()
|
|
&& ( !isPowerOfTwo( image.width()) || !isPowerOfTwo( image.height())))
|
|
{ // non-rectangular target requires POT texture
|
|
img = img.scaled( nearestPowerOfTwo( image.width()),
|
|
nearestPowerOfTwo( image.height()));
|
|
}
|
|
mScale.setWidth( 1.0 / img.width());
|
|
mScale.setHeight( 1.0 / img.height());
|
|
can_use_mipmaps = true;
|
|
}
|
|
else
|
|
{
|
|
mScale.setWidth( 1.0 );
|
|
mScale.setHeight( 1.0 );
|
|
can_use_mipmaps = false;
|
|
}
|
|
setFilter( GL_LINEAR );
|
|
mSize = img.size();
|
|
y_inverted = false;
|
|
|
|
img = convertToGLFormat( img );
|
|
|
|
setDirty();
|
|
if( isNull())
|
|
glGenTextures( 1, &mTexture );
|
|
bind();
|
|
glTexImage2D( mTarget, 0, GL_RGBA, img.width(), img.height(), 0,
|
|
GL_RGBA, GL_UNSIGNED_BYTE, img.bits());
|
|
unbind();
|
|
return true;
|
|
}
|
|
|
|
bool GLTexture::load( const QPixmap& pixmap, GLenum target )
|
|
{
|
|
if( pixmap.isNull())
|
|
return false;
|
|
return load( pixmap.toImage(), target );
|
|
}
|
|
|
|
bool GLTexture::load( const QString& fileName )
|
|
{
|
|
if( fileName.isEmpty())
|
|
return false;
|
|
return load( QImage( fileName ));
|
|
}
|
|
|
|
void GLTexture::discard()
|
|
{
|
|
setDirty();
|
|
if( mTexture != None )
|
|
glDeleteTextures( 1, &mTexture );
|
|
mTexture = None;
|
|
}
|
|
|
|
void GLTexture::bind()
|
|
{
|
|
glEnable( mTarget );
|
|
glBindTexture( mTarget, mTexture );
|
|
enableFilter();
|
|
}
|
|
|
|
void GLTexture::unbind()
|
|
{
|
|
glBindTexture( mTarget, 0 );
|
|
glDisable( mTarget );
|
|
}
|
|
|
|
void GLTexture::render( int mask, QRegion region, const QRect& rect )
|
|
{
|
|
return render( !( mask & ( Effect::PAINT_WINDOW_TRANSFORMED | Effect::PAINT_SCREEN_TRANSFORMED )),
|
|
region, rect );
|
|
}
|
|
|
|
void GLTexture::render( bool clip, QRegion region, const QRect& rect )
|
|
{
|
|
const float verts[ 4 * 2 ] =
|
|
{
|
|
rect.x(), rect.y(),
|
|
rect.x(), rect.y() + rect.height(),
|
|
rect.x() + rect.width(), rect.y() + rect.height(),
|
|
rect.x() + rect.width(), rect.y()
|
|
};
|
|
const float texcoords[ 4 * 2 ] =
|
|
{
|
|
0, 1,
|
|
0, 0,
|
|
1, 0,
|
|
1, 1
|
|
};
|
|
renderGLGeometry( clip, region, 4, verts, texcoords );
|
|
}
|
|
|
|
void GLTexture::enableUnnormalizedTexCoords()
|
|
{
|
|
// update texture matrix to handle GL_TEXTURE_2D and GL_TEXTURE_RECTANGLE
|
|
glMatrixMode( GL_TEXTURE );
|
|
glPushMatrix();
|
|
glLoadIdentity();
|
|
glScalef( mScale.width(), mScale.height(), 1 );
|
|
if( !y_inverted )
|
|
{
|
|
// Modify texture matrix so that we could always use non-opengl
|
|
// coordinates for textures
|
|
glScalef( 1, -1, 1 );
|
|
glTranslatef( 0, -mSize.height(), 0 );
|
|
}
|
|
glMatrixMode( GL_MODELVIEW );
|
|
}
|
|
|
|
void GLTexture::disableUnnormalizedTexCoords()
|
|
{
|
|
// Restore texture matrix
|
|
glMatrixMode( GL_TEXTURE );
|
|
glPopMatrix();
|
|
glMatrixMode( GL_MODELVIEW );
|
|
}
|
|
|
|
GLuint GLTexture::texture() const
|
|
{
|
|
return mTexture;
|
|
}
|
|
|
|
GLenum GLTexture::target() const
|
|
{
|
|
return mTarget;
|
|
}
|
|
|
|
GLenum GLTexture::filter() const
|
|
{
|
|
return mFilter;
|
|
}
|
|
|
|
bool GLTexture::isDirty() const
|
|
{
|
|
return has_valid_mipmaps;
|
|
}
|
|
|
|
void GLTexture::setTexture( GLuint texture )
|
|
{
|
|
discard();
|
|
mTexture = texture;
|
|
}
|
|
|
|
void GLTexture::setTarget( GLenum target )
|
|
{
|
|
mTarget = target;
|
|
}
|
|
|
|
void GLTexture::setFilter( GLenum filter )
|
|
{
|
|
mFilter = filter;
|
|
}
|
|
|
|
void GLTexture::setWrapMode( GLenum mode )
|
|
{
|
|
bind();
|
|
glTexParameteri( mTarget, GL_TEXTURE_WRAP_S, mode );
|
|
glTexParameteri( mTarget, GL_TEXTURE_WRAP_T, mode );
|
|
unbind();
|
|
}
|
|
|
|
void GLTexture::setDirty()
|
|
{
|
|
has_valid_mipmaps = false;
|
|
}
|
|
|
|
|
|
void GLTexture::enableFilter()
|
|
{
|
|
if( mFilter == GL_LINEAR_MIPMAP_LINEAR )
|
|
{ // trilinear filtering requested, but is it possible?
|
|
if( NPOTTextureSupported()
|
|
&& framebufferObjectSupported()
|
|
&& can_use_mipmaps )
|
|
{
|
|
glTexParameteri( mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR );
|
|
glTexParameteri( mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
|
|
if( !has_valid_mipmaps )
|
|
{
|
|
glGenerateMipmap( mTarget );
|
|
has_valid_mipmaps = true;
|
|
}
|
|
}
|
|
else
|
|
{ // can't use trilinear, so use bilinear
|
|
setFilter( GL_LINEAR );
|
|
glTexParameteri( mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
|
|
glTexParameteri( mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
|
|
}
|
|
}
|
|
else if( mFilter == GL_LINEAR )
|
|
{
|
|
glTexParameteri( mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
|
|
glTexParameteri( mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
|
|
}
|
|
else
|
|
{ // if neither trilinear nor bilinear, default to fast filtering
|
|
setFilter( GL_NEAREST );
|
|
glTexParameteri( mTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
|
|
glTexParameteri( mTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
|
|
}
|
|
}
|
|
|
|
QImage GLTexture::convertToGLFormat( const QImage& img ) const
|
|
{
|
|
// This method has been copied from Qt's QGLWidget::convertToGLFormat()
|
|
QImage res = img.convertToFormat(QImage::Format_ARGB32);
|
|
res = res.mirrored();
|
|
|
|
if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
|
|
// Qt has ARGB; OpenGL wants RGBA
|
|
for (int i=0; i < res.height(); i++) {
|
|
uint *p = (uint*)res.scanLine(i);
|
|
uint *end = p + res.width();
|
|
while (p < end) {
|
|
*p = (*p << 8) | ((*p >> 24) & 0xFF);
|
|
p++;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// Qt has ARGB; OpenGL wants ABGR (i.e. RGBA backwards)
|
|
res = res.rgbSwapped();
|
|
}
|
|
return res;
|
|
}
|
|
|
|
//****************************************
|
|
// GLShader
|
|
//****************************************
|
|
|
|
bool GLShader::mFragmentShaderSupported = false;
|
|
bool GLShader::mVertexShaderSupported = false;
|
|
|
|
void GLShader::initStatic()
|
|
{
|
|
mFragmentShaderSupported = mVertexShaderSupported =
|
|
hasGLExtension("GL_ARB_shader_objects") && hasGLExtension("GL_ARB_shading_language_100");
|
|
mVertexShaderSupported &= hasGLExtension("GL_ARB_vertex_shader");
|
|
mFragmentShaderSupported &= hasGLExtension("GL_ARB_fragment_shader");
|
|
}
|
|
|
|
|
|
GLShader::GLShader(const QString& vertexfile, const QString& fragmentfile)
|
|
{
|
|
mValid = false;
|
|
mVariableLocations = 0;
|
|
mProgram = 0;
|
|
|
|
loadFromFiles(vertexfile, fragmentfile);
|
|
}
|
|
|
|
GLShader::~GLShader()
|
|
{
|
|
if(mVariableLocations)
|
|
{
|
|
mVariableLocations->clear();
|
|
delete mVariableLocations;
|
|
}
|
|
|
|
if(mProgram)
|
|
{
|
|
glDeleteProgram(mProgram);
|
|
}
|
|
}
|
|
|
|
bool GLShader::loadFromFiles(const QString& vertexfile, const QString& fragmentfile)
|
|
{
|
|
QFile vf(vertexfile);
|
|
if(!vf.open(QIODevice::ReadOnly))
|
|
{
|
|
kError(1212) << "Couldn't open '" << vertexfile << "' for reading!" << endl;
|
|
return false;
|
|
}
|
|
QString vertexsource(vf.readAll());
|
|
|
|
QFile ff(fragmentfile);
|
|
if(!ff.open(QIODevice::ReadOnly))
|
|
{
|
|
kError(1212) << "Couldn't open '" << fragmentfile << "' for reading!" << endl;
|
|
return false;
|
|
}
|
|
QString fragsource(ff.readAll());
|
|
|
|
return load(vertexsource, fragsource);
|
|
}
|
|
|
|
bool GLShader::load(const QString& vertexsource, const QString& fragmentsource)
|
|
{
|
|
// Make sure shaders are actually supported
|
|
if(( !vertexsource.isEmpty() && !vertexShaderSupported() ) ||
|
|
( !fragmentsource.isEmpty() && !fragmentShaderSupported() ))
|
|
{
|
|
kDebug(1212) << "Shaders not supported";
|
|
return false;
|
|
}
|
|
|
|
GLuint vertexshader;
|
|
GLuint fragmentshader;
|
|
|
|
GLsizei logsize, logarraysize;
|
|
char* log = 0;
|
|
|
|
// Create program object
|
|
mProgram = glCreateProgram();
|
|
if(!vertexsource.isEmpty())
|
|
{
|
|
// Create shader object
|
|
vertexshader = glCreateShader(GL_VERTEX_SHADER);
|
|
// Load it
|
|
const QByteArray& srcba = vertexsource.toLatin1();
|
|
const char* src = srcba.data();
|
|
glShaderSource(vertexshader, 1, &src, NULL);
|
|
// Compile the shader
|
|
glCompileShader(vertexshader);
|
|
// Make sure it compiled correctly
|
|
int compiled;
|
|
glGetShaderiv(vertexshader, GL_COMPILE_STATUS, &compiled);
|
|
// Get info log
|
|
glGetShaderiv(vertexshader, GL_INFO_LOG_LENGTH, &logarraysize);
|
|
log = new char[logarraysize];
|
|
glGetShaderInfoLog(vertexshader, logarraysize, &logsize, log);
|
|
if(!compiled)
|
|
{
|
|
kError(1212) << "Couldn't compile vertex shader! Log:" << endl << log << endl;
|
|
delete[] log;
|
|
return false;
|
|
}
|
|
else if(logsize > 0)
|
|
kDebug(1212) << "Vertex shader compilation log:"<< log;
|
|
// Attach the shader to the program
|
|
glAttachShader(mProgram, vertexshader);
|
|
// Delete shader
|
|
glDeleteShader(vertexshader);
|
|
delete[] log;
|
|
}
|
|
|
|
|
|
if(!fragmentsource.isEmpty())
|
|
{
|
|
fragmentshader = glCreateShader(GL_FRAGMENT_SHADER);
|
|
// Load it
|
|
const QByteArray& srcba = fragmentsource.toLatin1();
|
|
const char* src = srcba.data();
|
|
glShaderSource(fragmentshader, 1, &src, NULL);
|
|
//glShaderSource(fragmentshader, 1, &fragmentsrc.latin1(), NULL);
|
|
// Compile the shader
|
|
glCompileShader(fragmentshader);
|
|
// Make sure it compiled correctly
|
|
int compiled;
|
|
glGetShaderiv(fragmentshader, GL_COMPILE_STATUS, &compiled);
|
|
// Get info log
|
|
glGetShaderiv(fragmentshader, GL_INFO_LOG_LENGTH, &logarraysize);
|
|
log = new char[logarraysize];
|
|
glGetShaderInfoLog(fragmentshader, logarraysize, &logsize, log);
|
|
if(!compiled)
|
|
{
|
|
kError(1212) << "Couldn't compile fragment shader! Log:" << endl << log << endl;
|
|
delete[] log;
|
|
return false;
|
|
}
|
|
else if(logsize > 0)
|
|
kDebug(1212) << "Fragment shader compilation log:"<< log;
|
|
// Attach the shader to the program
|
|
glAttachShader(mProgram, fragmentshader);
|
|
// Delete shader
|
|
glDeleteShader(fragmentshader);
|
|
delete[] log;
|
|
}
|
|
|
|
|
|
// Link the program
|
|
glLinkProgram(mProgram);
|
|
// Make sure it linked correctly
|
|
int linked;
|
|
glGetProgramiv(mProgram, GL_LINK_STATUS, &linked);
|
|
// Get info log
|
|
glGetProgramiv(mProgram, GL_INFO_LOG_LENGTH, &logarraysize);
|
|
log = new char[logarraysize];
|
|
glGetProgramInfoLog(mProgram, logarraysize, &logsize, log);
|
|
if(!linked)
|
|
{
|
|
kError(1212) << "Couldn't link the program! Log" << endl << log << endl;
|
|
delete[] log;
|
|
return false;
|
|
}
|
|
else if(logsize > 0)
|
|
kDebug(1212) << "Shader linking log:"<< log;
|
|
delete[] log;
|
|
|
|
mVariableLocations = new QHash<QString, int>;
|
|
|
|
mValid = true;
|
|
return true;
|
|
}
|
|
|
|
void GLShader::bind()
|
|
{
|
|
glUseProgram(mProgram);
|
|
}
|
|
|
|
void GLShader::unbind()
|
|
{
|
|
glUseProgram(0);
|
|
}
|
|
|
|
int GLShader::uniformLocation(const QString& name)
|
|
{
|
|
if(!mVariableLocations)
|
|
{
|
|
return -1;
|
|
}
|
|
if(!mVariableLocations->contains(name))
|
|
{
|
|
int location = glGetUniformLocation(mProgram, name.toLatin1().data());
|
|
mVariableLocations->insert(name, location);
|
|
}
|
|
return mVariableLocations->value(name);
|
|
}
|
|
|
|
bool GLShader::setUniform(const QString& name, float value)
|
|
{
|
|
int location = uniformLocation(name);
|
|
if(location >= 0)
|
|
{
|
|
glUniform1f(location, value);
|
|
}
|
|
return (location >= 0);
|
|
}
|
|
|
|
bool GLShader::setUniform(const QString& name, int value)
|
|
{
|
|
int location = uniformLocation(name);
|
|
if(location >= 0)
|
|
{
|
|
glUniform1i(location, value);
|
|
}
|
|
return (location >= 0);
|
|
}
|
|
|
|
int GLShader::attributeLocation(const QString& name)
|
|
{
|
|
if(!mVariableLocations)
|
|
{
|
|
return -1;
|
|
}
|
|
if(!mVariableLocations->contains(name))
|
|
{
|
|
int location = glGetAttribLocation(mProgram, name.toLatin1().data());
|
|
mVariableLocations->insert(name, location);
|
|
}
|
|
return mVariableLocations->value(name);
|
|
}
|
|
|
|
bool GLShader::setAttribute(const QString& name, float value)
|
|
{
|
|
int location = attributeLocation(name);
|
|
if(location >= 0)
|
|
{
|
|
glVertexAttrib1f(location, value);
|
|
}
|
|
return (location >= 0);
|
|
}
|
|
|
|
|
|
|
|
/*** GLRenderTarget ***/
|
|
bool GLRenderTarget::mSupported = false;
|
|
|
|
void GLRenderTarget::initStatic()
|
|
{
|
|
mSupported = hasGLExtension("GL_EXT_framebuffer_object") && glFramebufferTexture2D;
|
|
}
|
|
|
|
GLRenderTarget::GLRenderTarget(GLTexture* color)
|
|
{
|
|
// Reset variables
|
|
mValid = false;
|
|
|
|
mTexture = color;
|
|
|
|
// Make sure FBO is supported
|
|
if(mSupported && mTexture && !mTexture->isNull())
|
|
{
|
|
initFBO();
|
|
}
|
|
else
|
|
kError(1212) << "Render targets aren't supported!" << endl;
|
|
}
|
|
|
|
GLRenderTarget::~GLRenderTarget()
|
|
{
|
|
if(mValid)
|
|
{
|
|
glDeleteFramebuffers(1, &mFramebuffer);
|
|
}
|
|
}
|
|
|
|
bool GLRenderTarget::enable()
|
|
{
|
|
if(!valid())
|
|
{
|
|
kError(1212) << "Can't enable invalid render target!" << endl;
|
|
return false;
|
|
}
|
|
|
|
glBindFramebuffer(GL_FRAMEBUFFER_EXT, mFramebuffer);
|
|
mTexture->setDirty();
|
|
|
|
return true;
|
|
}
|
|
|
|
bool GLRenderTarget::disable()
|
|
{
|
|
if(!valid())
|
|
{
|
|
kError(1212) << "Can't disable invalid render target!" << endl;
|
|
return false;
|
|
}
|
|
|
|
glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
|
|
mTexture->setDirty();
|
|
|
|
return true;
|
|
}
|
|
|
|
void GLRenderTarget::initFBO()
|
|
{
|
|
glGenFramebuffers(1, &mFramebuffer);
|
|
glBindFramebuffer(GL_FRAMEBUFFER_EXT, mFramebuffer);
|
|
|
|
glFramebufferTexture2D(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
|
|
mTexture->target(), mTexture->texture(), 0);
|
|
|
|
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER_EXT);
|
|
if(status != GL_FRAMEBUFFER_COMPLETE_EXT)
|
|
{
|
|
kError(1212) << "Invalid fb status: " << status << endl;
|
|
}
|
|
|
|
glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
|
|
|
|
mValid = true;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
#endif
|