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Moved final colour space conversion out of the innermost loop.

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This commit is contained in:
Thomas Harte 2016-04-22 21:29:27 -04:00
parent 8ff1f82008
commit a4889074b8
1 changed files with 18 additions and 9 deletions
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27
Outputs/CRT/Internals/CRTOpenGL.cpp
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@ -258,6 +258,11 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
composite_y_filter_shader_program.get(),
composite_chrominance_filter_shader_program.get()
};
float clear_colours[][3] = {
{0.0, 0.0, 0.0},
{0.0, 0.5, 0.5},
{0.0, 0.0, 0.0}
};
for(int stage = 0; stage < 3; stage++)
{
// switch to the initial texture
@ -268,6 +273,7 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
if(number_of_clearing_zones)
{
glEnable(GL_SCISSOR_TEST);
glClearColor(clear_colours[stage][0], clear_colours[stage][1], clear_colours[stage][2], 1.0);
for(int c = 0; c < number_of_clearing_zones; c++)
{
glScissor(0, clearing_zones[c*2], IntermediateBufferWidth, clearing_zones[c*2 + 1]);
@ -286,6 +292,7 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
// switch back to screen output
glBindFramebuffer(GL_FRAMEBUFFER, defaultFramebuffer);
glViewport(0, 0, (GLsizei)output_width, (GLsizei)output_height);
glClearColor(0.0, 0.0, 0.0, 1.0);
}
// transfer to screen
@ -534,14 +541,16 @@ char *OpenGLOutputBuilder::get_y_filter_fragment_shader()
")"
");"
"vec2 quadrature = vec2(sin(phaseVarying), cos(phaseVarying)) * vec2(0.5);"
"float luminance = "
"dot(vec3("
"dot(samples[0], weights[0]),"
"dot(samples[1], weights[1]),"
"dot(samples[2], weights[2])"
"), vec3(1.0));"
"float chrominance = (samples[1].y - luminance) / amplitudeVarying;"
"float chrominance = 0.5 * (samples[1].y - luminance) / amplitudeVarying;"
"vec2 quadrature = vec2(sin(phaseVarying), cos(phaseVarying));"
"fragColour = vec3(luminance, vec2(0.5) + (chrominance * quadrature));"
"}");
}
@ -560,6 +569,7 @@ char *OpenGLOutputBuilder::get_chrominance_filter_fragment_shader()
"out vec3 fragColour;"
"uniform sampler2D texID;"
"const mat3 yuvToRGB = mat3(1.0, 1.0, 1.0, 0.0, -0.39465, 2.03211, 1.13983, -0.58060, 0.0);"
"void main(void)"
"{"
@ -589,7 +599,7 @@ char *OpenGLOutputBuilder::get_chrominance_filter_fragment_shader()
"vec4(samples[8].g, samples[9].g, samples[10].g, 0.0)"
");"
"fragColour = vec3(centreSample.r,"
"vec3 yuvColour = vec3(centreSample.r,"
"dot(vec3("
"dot(channel1[0], weights[0]),"
"dot(channel1[1], weights[1]),"
@ -601,6 +611,9 @@ char *OpenGLOutputBuilder::get_chrominance_filter_fragment_shader()
"dot(channel2[2], weights[2])"
"), vec3(1.0, 1.0, 1.0))"
");"
"vec3 yuvColourInRange = (yuvColour - vec3(0.0, 0.5, 0.5)) * vec3(1.0, 2.0, 2.0);"
"fragColour = yuvToRGB * yuvColourInRange; "
"}");
}
@ -684,12 +697,8 @@ char *OpenGLOutputBuilder::get_rgb_output_fragment_shader()
char *OpenGLOutputBuilder::get_composite_output_fragment_shader()
{
return get_output_fragment_shader("",
"uniform sampler2D texID;"
"const mat3 yuvToRGB = mat3(1.0, 1.0, 1.0, 0.0, -0.39465, 2.03211, 1.13983, -0.58060, 0.0);",
"vec3 srcColour = texture(texID, srcCoordinatesVarying).rgb;"
"vec3 yuvColour = vec3(srcColour.r, (srcColour.gb - vec2(0.5, 0.5)) * vec2(2.0, 2.0));"
"vec3 colour = yuvToRGB * yuvColour; "
"uniform sampler2D texID;",
"vec3 colour = texture(texID, srcCoordinatesVarying).rgb;"
);
}