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Use shader traits API for lanczos filter's shader

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This commit is contained in:
Martin Gräßlin 2015-12-01 09:57:37 +01:00
parent 99739106d1
commit b366f0ac01
4 changed files with 25 additions and 18 deletions
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22
lanczosfilter.cpp
View file

@ -33,6 +33,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include <kwineffects.h>
#include <QFile>
#include <qmath.h>
#include <cmath>
@ -45,7 +47,6 @@ LanczosFilter::LanczosFilter(QObject* parent)
, m_offscreenTarget(0)
, m_inited(false)
, m_shader(0)
, m_uTexUnit(0)
, m_uOffsets(0)
, m_uKernel(0)
{
@ -84,13 +85,16 @@ void LanczosFilter::init()
if (gl->isRadeon() && gl->chipClass() < R600)
return;
}
m_shader.reset(ShaderManager::instance()->loadFragmentShader(ShaderManager::SimpleShader,
gl->glslVersion() >= kVersionNumber(1, 40) ?
QStringLiteral(":/resources/shaders/1.40/lanczos-fragment.glsl") :
QStringLiteral(":/resources/shaders/1.10/lanczos-fragment.glsl")));
QFile ff(gl->glslVersion() >= kVersionNumber(1, 40) ?
QStringLiteral(":/resources/shaders/1.40/lanczos-fragment.glsl") :
QStringLiteral(":/resources/shaders/1.10/lanczos-fragment.glsl"));
if (!ff.open(QIODevice::ReadOnly)) {
qCDebug(KWIN_CORE) << "Failed to open lanczos shader";
return;
}
m_shader.reset(ShaderManager::instance()->generateCustomShader(ShaderTrait::MapTexture, QByteArray(), ff.readAll()));
if (m_shader->isValid()) {
ShaderBinder binder(m_shader.data());
m_uTexUnit = m_shader->uniformLocation("texUnit");
m_uKernel = m_shader->uniformLocation("kernel");
m_uOffsets = m_shader->uniformLocation("offsets");
} else {
@ -251,6 +255,10 @@ void LanczosFilter::performPaint(EffectWindowImpl* w, int mask, QRegion region,
updateOffscreenSurfaces();
GLRenderTarget::pushRenderTarget(m_offscreenTarget);
QMatrix4x4 modelViewProjectionMatrix;
modelViewProjectionMatrix.ortho(0, m_offscreenTex->width(), m_offscreenTex->height(), 0 , 0, 65535);
thumbData.setProjectionMatrix(modelViewProjectionMatrix);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
w->sceneWindow()->performPaint(mask, infiniteRegion(), thumbData);
@ -270,6 +278,7 @@ void LanczosFilter::performPaint(EffectWindowImpl* w, int mask, QRegion region,
createOffsets(kernelSize, sw, Qt::Horizontal);
ShaderManager::instance()->pushShader(m_shader.data());
m_shader->setUniform(GLShader::ModelViewProjectionMatrix, modelViewProjectionMatrix);
setUniforms();
// Draw the window back into the FBO, this time scaled horizontally
@ -408,7 +417,6 @@ void LanczosFilter::discardCacheTexture(EffectWindow *w)
void LanczosFilter::setUniforms()
{
glUniform1i(m_uTexUnit, 0);
glUniform2fv(m_uOffsets, 16, (const GLfloat*)m_offsets);
glUniform4fv(m_uKernel, 16, (const GLfloat*)m_kernel);
}

1
lanczosfilter.h
View file

@ -65,7 +65,6 @@ private:
QBasicTimer m_timer;
bool m_inited;
QScopedPointer<GLShader> m_shader;
int m_uTexUnit;
int m_uOffsets;
int m_uKernel;
QVector2D m_offsets[16];

10
shaders/1.10/lanczos-fragment.glsl
View file

@ -1,15 +1,15 @@
uniform sampler2D texUnit;
uniform sampler2D sampler;
uniform vec2 offsets[16];
uniform vec4 kernel[16];
varying vec2 varyingTexCoords;
varying vec2 texcoord0;
void main(void)
{
vec4 sum = texture2D(texUnit, varyingTexCoords.st) * kernel[0];
vec4 sum = texture2D(sampler, texcoord0.st) * kernel[0];
for (int i = 1; i < 16; i++) {
sum += texture2D(texUnit, varyingTexCoords.st - offsets[i]) * kernel[i];
sum += texture2D(texUnit, varyingTexCoords.st + offsets[i]) * kernel[i];
sum += texture2D(sampler, texcoord0.st - offsets[i]) * kernel[i];
sum += texture2D(sampler, texcoord0.st + offsets[i]) * kernel[i];
}
gl_FragColor = sum;
}

10
shaders/1.40/lanczos-fragment.glsl
View file

@ -1,18 +1,18 @@
#version 140
uniform sampler2D texUnit;
uniform sampler2D sampler;
uniform vec2 offsets[16];
uniform vec4 kernel[16];
in vec2 varyingTexCoords;
in vec2 texcoord0;
out vec4 fragColor;
void main(void)
{
vec4 sum = texture(texUnit, varyingTexCoords.st) * kernel[0];
vec4 sum = texture(sampler, texcoord0.st) * kernel[0];
for (int i = 1; i < 16; i++) {
sum += texture(texUnit, varyingTexCoords.st - offsets[i]) * kernel[i];
sum += texture(texUnit, varyingTexCoords.st + offsets[i]) * kernel[i];
sum += texture(sampler, texcoord0.st - offsets[i]) * kernel[i];
sum += texture(sampler, texcoord0.st + offsets[i]) * kernel[i];
}
fragColor = sum;
}