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Dithering shader: correct read threshold value from matrices.

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This commit is contained in:
Sergey Lipskiy 2020-03-29 19:43:56 +07:00
parent a0991dc9cf
commit 5ff3ef9649
1 changed files with 8 additions and 3 deletions
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11
src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp
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@ -521,6 +521,10 @@ public:
<< "# define texture2D texture" << std::endl;
m_part = ss.str();
}
m_part +=
// Return the vector of the standard basis of R^4 with a 1 at position <pos> and 0 otherwise.
" #define STVEC(pos) step(float(pos) - 0.5, vec4(0.0,1.0,2.0,3.0)) - step(float(pos) + 0.5, vec4(0.0,1.0,2.0,3.0)) \n";
}
};
@ -531,7 +535,6 @@ public:
{
#if 1
m_part =
" #define STVEC(pos) step(float(pos) - 0.5, vec4(0.0,1.0,2.0,3.0)) - step(float(pos) + 0.5, vec4(0.0,1.0,2.0,3.0)) \n" // Return the vector of the standard basis of R^4 with a 1 at position <pos> and 0 otherwise.
" #define MUXA(pos) dot(muxA, STVEC(pos)) \n"
" #define MUXB(pos) dot(muxB, STVEC(pos)) \n"
" #define MUXPM(pos) muxPM*(STVEC(pos)) \n"
@ -745,8 +748,10 @@ public:
// Try to keep dithering visible even at higher resolutions
" lowp float divider = 1.0 + step(3.0, uScreenScale.x); \n"
" mediump ivec2 position = ivec2(mod((gl_FragCoord.xy - 0.5) / divider,4.0));\n"
" lowp float bayerThreshold = bayer[position.x][position.y]; \n"
" lowp float mSquareThreshold = mSquare[position.x][position.y]; \n"
" lowp vec4 posX = STVEC(position.x); \n"
" lowp vec4 posY = STVEC(position.y); \n"
" lowp float bayerThreshold = dot(bayer*posY, posX); \n"
" lowp float mSquareThreshold = dot(mSquare*posY, posX); \n"
" switch (uColorDitherMode) { \n"
" case 0: \n"
" colorDither(vec3(mSquareThreshold), clampedColor.rgb); \n"