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metal vertex descriptors

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This commit is contained in:
Greg Wells
2025-06-06 12:24:09 -04:00
parent aff94e1085
commit 2385b5d819
1 changed files with 21 additions and 0 deletions
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21
rendering_api/metal/src/core/pipelines/graphics_pipeline/metal_graphics_pipeline.m
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@@ -19,6 +19,12 @@ MTLBlendOperation vkGryphnBlendOperation(enum gnBlendOperation_e operation) {
}
}
MTLVertexFormat mtlGryphnVertexFormat(gnVertexFormat format) {
switch (format) {
case GN_FLOAT2: return MTLVertexFormatFloat2;
}
}
gnReturnCode gnCreateGraphicsPipelineFn(struct gnGraphicsPipeline_t* graphicsPipeline, struct gnOutputDevice_t* device, struct gnGraphicsPipelineInfo_t info) {
graphicsPipeline->graphicsPipeline = malloc(sizeof(struct gnPlatformGraphicsPipeline_t));
MTLRenderPipelineDescriptor* descriptor = [[MTLRenderPipelineDescriptor alloc] init];
@@ -60,7 +66,22 @@ gnReturnCode gnCreateGraphicsPipelineFn(struct gnGraphicsPipeline_t* graphicsPip
}
}
MTLVertexDescriptor* vertexDescriptor = [[MTLVertexDescriptor alloc] init];
MTLVertexAttributeDescriptorArray* attributes = vertexDescriptor.attributes;
MTLVertexBufferLayoutDescriptorArray* buffers = vertexDescriptor.layouts;
int k = 0;
for (int i = 0; i < info.shaderInputLayout.bufferCount; i++) {
[[buffers objectAtIndexedSubscript:info.shaderInputLayout.bufferAttributes[i].binding] setStride:info.shaderInputLayout.bufferAttributes[i].size];
for (int j = 0; j < info.shaderInputLayout.bufferAttributes[i].attributeCount; j++) {
attributes[k].bufferIndex = i;
attributes[k].offset = info.shaderInputLayout.bufferAttributes[i].attributes[j].offset;
attributes[k].format = mtlGryphnVertexFormat(info.shaderInputLayout.bufferAttributes[i].attributes[j].format);
k++;
}
}
[descriptor setVertexDescriptor:vertexDescriptor];
NSError* error = nil;
graphicsPipeline->graphicsPipeline->graphicsPipeline = [device->outputDevice->device newRenderPipelineStateWithDescriptor:descriptor error:&error];
if (graphicsPipeline->graphicsPipeline->graphicsPipeline == nil) {