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Implement dual-source blending in shader

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For some GLES drivers that don't support dual-source blending, but do
support GL_EXT_shader_framebuffer_fetch, this might be useful.
This commit is contained in:
Jonathan Hamilton
2017-10-25 22:44:39 -07:00
parent 11976526d1
commit 29a9ed043b
12 changed files with 222 additions and 41 deletions
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23
Source/Core/VideoBackends/OGL/ProgramShaderCache.cpp
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@ -885,6 +885,24 @@ void ProgramShaderCache::CreateHeader()
}
}
std::string framebuffer_fetch_string;
switch (g_ogl_config.SupportedFramebufferFetch)
{
case ES_FB_FETCH_TYPE::FB_FETCH_EXT:
framebuffer_fetch_string = "#extension GL_EXT_shader_framebuffer_fetch: enable\n"
"#define FB_FETCH_VALUE ocol0\n"
"#define FRAGMENT_INOUT inout";
break;
case ES_FB_FETCH_TYPE::FB_FETCH_ARM:
framebuffer_fetch_string = "#extension GL_ARM_shader_framebuffer_fetch: enable\n"
"#define FB_FETCH_VALUE gl_LastFragColorARM\n"
"#define FRAGMENT_INOUT out";
break;
case ES_FB_FETCH_TYPE::FB_FETCH_NONE:
framebuffer_fetch_string = "";
break;
}
s_glsl_header = StringFromFormat(
"%s\n"
"%s\n" // ubo
@ -902,6 +920,7 @@ void ProgramShaderCache::CreateHeader()
"%s\n" // ES texture buffer
"%s\n" // ES dual source blend
"%s\n" // shader image load store
"%s\n" // shader framebuffer fetch
// Precision defines for GLSL ES
"%s\n"
@ -976,8 +995,8 @@ void ProgramShaderCache::CreateHeader()
((!is_glsles && v < GLSL_430) || (is_glsles && v < GLSLES_310)) ?
"#extension GL_ARB_shader_image_load_store : enable" :
"",
is_glsles ? "precision highp float;" : "", is_glsles ? "precision highp int;" : "",
is_glsles ? "precision highp sampler2DArray;" : "",
framebuffer_fetch_string.c_str(), is_glsles ? "precision highp float;" : "",
is_glsles ? "precision highp int;" : "", is_glsles ? "precision highp sampler2DArray;" : "",
(is_glsles && g_ActiveConfig.backend_info.bSupportsPaletteConversion) ?
"precision highp usamplerBuffer;" :
"",