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Added GLSL 120 fallback support

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This commit is contained in:
Magnus Norddahl 2016-07-31 03:54:16 +02:00
parent c93204cace
commit 849e80074e
2 changed files with 32 additions and 0 deletions
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30
src/gl/shaders/gl_blurshader.cpp
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@ -86,6 +86,20 @@ void FBlurShader::Blur(FFlatVertexBuffer *vbo, float blurAmount, int sampleCount
else
setup->HorizontalShader->Bind();
if (gl.glslversion < 1.3)
{
if (vertical)
{
setup->VerticalScaleX.Set(1.0f / width);
setup->VerticalScaleY.Set(1.0f / height);
}
else
{
setup->HorizontalScaleX.Set(1.0f / width);
setup->HorizontalScaleY.Set(1.0f / height);
}
}
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, inputTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
@ -145,6 +159,14 @@ FBlurShader::BlurSetup *FBlurShader::GetSetup(float blurAmount, int sampleCount)
blurSetup.HorizontalShader->Link("horizontal blur");
blurSetup.HorizontalShader->Bind();
glUniform1i(glGetUniformLocation(*blurSetup.HorizontalShader.get(), "SourceTexture"), 0);
if (gl.glslversion < 1.3)
{
blurSetup.VerticalScaleX.Init(*blurSetup.VerticalShader.get(), "ScaleX");
blurSetup.VerticalScaleY.Init(*blurSetup.VerticalShader.get(), "ScaleY");
blurSetup.HorizontalScaleX.Init(*blurSetup.HorizontalShader.get(), "ScaleX");
blurSetup.HorizontalScaleY.Init(*blurSetup.HorizontalShader.get(), "ScaleY");
}
mBlurSetups.Push(blurSetup);
@ -188,6 +210,14 @@ FString FBlurShader::FragmentShaderCode(float blurAmount, int sampleCount, bool
in vec2 TexCoord;
uniform sampler2D SourceTexture;
out vec4 FragColor;
#if __VERSION__ < 130
uniform float ScaleX;
uniform float ScaleY;
vec4 textureOffset(sampler2D s, vec2 texCoord, ivec2 offset)
{
return texture2D(s, texCoord + vec2(ScaleX * float(offset.x), ScaleY * float(offset.y)));
}
#endif
void main()
{
FragColor = %s;

2
src/gl/shaders/gl_blurshader.h
View file

@ -23,6 +23,8 @@ private:
int sampleCount;
std::shared_ptr<FShaderProgram> VerticalShader;
std::shared_ptr<FShaderProgram> HorizontalShader;
FBufferedUniform1f VerticalScaleX, VerticalScaleY;
FBufferedUniform1f HorizontalScaleX, HorizontalScaleY;
};
BlurSetup *GetSetup(float blurAmount, int sampleCount);