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Bug 1055646 - Allow setting the uniforms of the blur shader on ShaderProgramOGL. r=nical

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This commit is contained in:
Markus Stange 2014-09-02 14:09:26 +02:00
parent 703198fcf7
commit d07acdd93c
2 changed files with 63 additions and 0 deletions
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24
gfx/layers/opengl/OGLShaderProgram.cpp
View File

@ -49,6 +49,10 @@ AddUniforms(ProgramProfileOGL& aProfile)
"uTexturePass2",
"uColorMatrix",
"uColorMatrixVector",
"uBlurRadius",
"uBlurOffset",
"uBlurAlpha",
"uBlurGaussianKernel",
nullptr
};
@ -549,5 +553,25 @@ ShaderProgramOGL::Activate()
mGL->fUseProgram(mProgram);
}
void
ShaderProgramOGL::SetBlurRadius(float aRX, float aRY)
{
float f[] = {aRX, aRY};
SetUniform(KnownUniform::BlurRadius, 2, f);
float gaussianKernel[GAUSSIAN_KERNEL_HALF_WIDTH];
float sum = 0.0f;
for (int i = 0; i < GAUSSIAN_KERNEL_HALF_WIDTH; i++) {
float x = i * GAUSSIAN_KERNEL_STEP;
float sigma = 1.0f;
gaussianKernel[i] = exp(-x * x / (2 * sigma * sigma)) / sqrt(2 * M_PI * sigma * sigma);
sum += gaussianKernel[i] * (i == 0 ? 1 : 2);
}
for (int i = 0; i < GAUSSIAN_KERNEL_HALF_WIDTH; i++) {
gaussianKernel[i] /= sum;
}
SetArrayUniform(KnownUniform::BlurGaussianKernel, GAUSSIAN_KERNEL_HALF_WIDTH, gaussianKernel);
}
} /* layers */
} /* mozilla */

39
gfx/layers/opengl/OGLShaderProgram.h
View File

@ -70,6 +70,10 @@ public:
TexturePass2,
ColorMatrix,
ColorMatrixVector,
BlurRadius,
BlurOffset,
BlurAlpha,
BlurGaussianKernel,
KnownUniformCount
};
@ -147,6 +151,19 @@ public:
return false;
}
bool UpdateArrayUniform(int cnt, const float *fp) {
if (mLocation == -1) return false;
if (cnt > 16) {
return false;
}
if (memcmp(mValue.f16v, fp, sizeof(float) * cnt) != 0) {
memcpy(mValue.f16v, fp, sizeof(float) * cnt);
return true;
}
return false;
}
KnownUniformName mName;
const char *mNameString;
int32_t mLocation;
@ -389,6 +406,17 @@ public:
SetUniform(KnownUniform::TexturePass2, aFlag ? 1 : 0);
}
void SetBlurRadius(float aRX, float aRY);
void SetBlurAlpha(float aAlpha) {
SetUniform(KnownUniform::BlurAlpha, aAlpha);
}
void SetBlurOffset(float aOffsetX, float aOffsetY) {
float f[] = {aOffsetX, aOffsetY};
SetUniform(KnownUniform::BlurOffset, 2, f);
}
size_t GetTextureCount() const {
return mProfile.mTextureCount;
}
@ -459,6 +487,17 @@ protected:
}
}
void SetArrayUniform(KnownUniform::KnownUniformName aKnownUniform, int aLength, float *aFloatValues)
{
ASSERT_THIS_PROGRAM;
NS_ASSERTION(aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount, "Invalid known uniform");
KnownUniform& ku(mProfile.mUniforms[aKnownUniform]);
if (ku.UpdateArrayUniform(aLength, aFloatValues)) {
mGL->fUniform1fv(ku.mLocation, aLength, ku.mValue.f16v);
}
}
void SetUniform(KnownUniform::KnownUniformName aKnownUniform, GLint aIntValue) {
ASSERT_THIS_PROGRAM;
NS_ASSERTION(aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount, "Invalid known uniform");