void set_dynamic_blend_constant_state(GrVkGpu* gpu,
GrVkCommandBuffer* cmdBuffer,
const GrPipeline& pipeline) {
GrXferProcessor::BlendInfo blendInfo;
pipeline.getXferProcessor().getBlendInfo(&blendInfo);
GrBlendCoeff srcCoeff = blendInfo.fSrcBlend;
GrBlendCoeff dstCoeff = blendInfo.fDstBlend;
float floatColors[4];
if (blend_coeff_refs_constant(srcCoeff) || blend_coeff_refs_constant(dstCoeff)) {
GrColorToRGBAFloat(blendInfo.fBlendConstant, floatColors);
} else {
memset(floatColors, 0, 4 * sizeof(float));
}
cmdBuffer->setBlendConstants(gpu, floatColors);
}
void setup_color_blend_state(const GrVkGpu* gpu,
const GrPipeline& pipeline,
VkPipelineColorBlendStateCreateInfo* colorBlendInfo,
VkPipelineColorBlendAttachmentState* attachmentState) {
GrXferProcessor::BlendInfo blendInfo;
pipeline.getXferProcessor().getBlendInfo(&blendInfo);
GrBlendEquation equation = blendInfo.fEquation;
GrBlendCoeff srcCoeff = blendInfo.fSrcBlend;
GrBlendCoeff dstCoeff = blendInfo.fDstBlend;
bool blendOff = (kAdd_GrBlendEquation == equation || kSubtract_GrBlendEquation == equation) &&
kOne_GrBlendCoeff == srcCoeff && kZero_GrBlendCoeff == dstCoeff;
memset(attachmentState, 0, sizeof(VkPipelineColorBlendAttachmentState));
attachmentState->blendEnable = !blendOff;
if (!blendOff) {
attachmentState->srcColorBlendFactor = blend_coeff_to_vk_blend(srcCoeff);
attachmentState->dstColorBlendFactor = blend_coeff_to_vk_blend(dstCoeff);
attachmentState->colorBlendOp = blend_equation_to_vk_blend_op(equation);
attachmentState->srcAlphaBlendFactor = blend_coeff_to_vk_blend(srcCoeff);
attachmentState->dstAlphaBlendFactor = blend_coeff_to_vk_blend(dstCoeff);
attachmentState->alphaBlendOp = blend_equation_to_vk_blend_op(equation);
}
attachmentState->colorWriteMask = VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT |
VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
memset(colorBlendInfo, 0, sizeof(VkPipelineColorBlendStateCreateInfo));
colorBlendInfo->sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
colorBlendInfo->pNext = nullptr;
colorBlendInfo->flags = 0;
colorBlendInfo->logicOpEnable = VK_FALSE;
colorBlendInfo->attachmentCount = 1;
colorBlendInfo->pAttachments = attachmentState;
if (blend_coeff_refs_constant(srcCoeff) || blend_coeff_refs_constant(dstCoeff)) {
GrColorToRGBAFloat(blendInfo.fBlendConstant, colorBlendInfo->blendConstants);
}
}
