static uint32_t gen_texture_key(const GrProcessor& proc, const GrGLCaps& caps) {
uint32_t key = 0;
int numTextures = proc.numTextures();
for (int t = 0; t < numTextures; ++t) {
const GrTextureAccess& access = proc.textureAccess(t);
uint32_t configComponentMask = GrPixelConfigComponentMask(access.getTexture()->config());
if (swizzle_requires_alpha_remapping(caps, configComponentMask, access.swizzleMask())) {
key |= 1 << t;
}
}
return key;
}
uint32_t GrGLProgramEffects::GenTextureKey(const GrDrawEffect& drawEffect, const GrGLCaps& caps) {
uint32_t key = 0;
int numTextures = drawEffect.effect()->numTextures();
for (int t = 0; t < numTextures; ++t) {
const GrTextureAccess& access = drawEffect.effect()->textureAccess(t);
uint32_t configComponentMask = GrPixelConfigComponentMask(access.getTexture()->config());
if (swizzle_requires_alpha_remapping(caps, configComponentMask, access.swizzleMask())) {
key |= 1 << t;
}
}
return key;
}
static uint32_t gen_texture_key(const GrProcessor& proc, const GrGLCaps& caps) {
uint32_t key = 0;
int numTextures = proc.numTextures();
int shift = 0;
for (int t = 0; t < numTextures; ++t) {
const GrTextureAccess& access = proc.textureAccess(t);
if (swizzle_requires_alpha_remapping(*caps.glslCaps(), access.getTexture()->config())) {
key |= 1 << shift;
}
if (GR_GL_TEXTURE_EXTERNAL == static_cast<GrGLTexture*>(access.getTexture())->target()) {
key |= 2 << shift;
}
shift += 2;
}
return key;
}
GrBackendEffectFactory::EffectKey GrGLShaderBuilder::KeyForTextureAccess(
const GrTextureAccess& access,
const GrGLCaps& caps) {
GrBackendEffectFactory::EffectKey key = 0;
// Assume that swizzle support implies that we never have to modify a shader to adjust
// for texture format/swizzle settings.
if (!caps.textureSwizzleSupport() && swizzle_requires_alpha_remapping(caps, access)) {
key = 1;
}
#if GR_DEBUG
// Assert that key is set iff the swizzle will be modified.
SkString origString(access.getSwizzle());
origString.prepend(".");
SkString modifiedString;
append_swizzle(&modifiedString, access, caps);
if (!modifiedString.size()) {
modifiedString = ".rgba";
}
GrAssert(SkToBool(key) == (modifiedString != origString));
#endif
return key;
}
