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Explicitly enable dual source blending in shader.

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Without this, the shader fails to compile on SHIELD devices with
up-to-date drivers.  It may have also been failing on other devices.

The specification notes that the #extension line must be used.
This commit is contained in:
Unknown W. Brackets 2016-03-05 13:27:27 -08:00
parent 7dfe8b58dc
commit 212848c1cc
1 changed files with 10 additions and 1 deletions
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11
GPU/GLES/FragmentShaderGenerator.cpp
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@ -60,6 +60,8 @@ bool GenerateFragmentShader(const ShaderID &id, char *buffer) {
bool bitwiseOps = false;
const char *lastFragData = nullptr;
ReplaceAlphaType stencilToAlpha = static_cast<ReplaceAlphaType>(id.Bits(FS_BIT_STENCIL_TO_ALPHA, 2));
if (gl_extensions.IsGLES) {
// ES doesn't support dual source alpha :(
if (gstate_c.featureFlags & GPU_SUPPORTS_GLSL_ES_300) {
@ -69,6 +71,10 @@ bool GenerateFragmentShader(const ShaderID &id, char *buffer) {
glslES30 = true;
bitwiseOps = true;
texelFetch = "texelFetch";
if (stencilToAlpha == REPLACE_ALPHA_DUALSOURCE && gl_extensions.EXT_blend_func_extended) {
WRITE(p, "#extension GL_EXT_blend_func_extended : require\n");
}
} else {
WRITE(p, "#version 100\n"); // GLSL ES 1.0
if (gl_extensions.EXT_gpu_shader4) {
@ -79,6 +85,10 @@ bool GenerateFragmentShader(const ShaderID &id, char *buffer) {
if (gl_extensions.EXT_blend_func_extended) {
// Oldy moldy GLES, so use the fixed output name.
fragColor1 = "gl_SecondaryFragColorEXT";
if (stencilToAlpha == REPLACE_ALPHA_DUALSOURCE && gl_extensions.EXT_blend_func_extended) {
WRITE(p, "#extension GL_EXT_blend_func_extended : require\n");
}
}
}
@ -164,7 +174,6 @@ bool GenerateFragmentShader(const ShaderID &id, char *buffer) {
bool textureAtOffset = id.Bit(FS_BIT_TEXTURE_AT_OFFSET);
ReplaceBlendType replaceBlend = static_cast<ReplaceBlendType>(id.Bits(FS_BIT_REPLACE_BLEND, 3));
ReplaceAlphaType stencilToAlpha = static_cast<ReplaceAlphaType>(id.Bits(FS_BIT_STENCIL_TO_ALPHA, 2));
GEBlendSrcFactor replaceBlendFuncA = (GEBlendSrcFactor)id.Bits(FS_BIT_BLENDFUNC_A, 4);
GEBlendDstFactor replaceBlendFuncB = (GEBlendDstFactor)id.Bits(FS_BIT_BLENDFUNC_B, 4);