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metal framebuffers

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This commit is contained in:
Greg Wells
2025-05-29 13:05:54 -04:00
parent 5158bef0dd
commit 32f49ebe97
3 changed files with 85 additions and 1 deletions
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8
rendering_api/metal/src/core/framebuffers/metal_framebuffer.h Normal file
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@@ -0,0 +1,8 @@
#pragma once
#include "core/framebuffer/gryphn_framebuffer.h"
#import <Metal/Metal.h>
#import <Metal/MTLRenderPass.h>
typedef struct gnPlatformFramebuffer_t {
MTLRenderPassDescriptor* framebuffer;
} gnPlatformFramebuffer;

74
rendering_api/metal/src/core/framebuffers/metal_framebuffer.m Normal file
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@@ -0,0 +1,74 @@
#include "metal_framebuffer.h"
#include "core/debugger/gryphn_debugger.h"
#include "core/texture/metal_texture.h"
gnBool isDepthFormat(gnImageFormat format) {
return gnFalse;
}
gnBool isStencilFormat(gnImageFormat format) {
return gnFalse;
}
MTLLoadAction mtlGryphnLoadOperation(enum gnLoadOperation_e loadOperation) {
switch(loadOperation) {
case GN_LOAD_OPERATION_LOAD: return MTLLoadActionLoad;
case GN_LOAD_OPERATION_CLEAR: return MTLLoadActionClear;
case GN_LOAD_OPERATION_DONT_CARE: return MTLLoadActionDontCare;
}
}
MTLStoreAction mtlGryphnStoreOperation(enum gnStoreOperation_e storeOperation) {
switch (storeOperation) {
case GN_STORE_OPERATION_STORE: return MTLStoreActionStore;
case GN_STORE_OPERATION_DONT_CARE: return MTLStoreActionDontCare;
}
}
gnReturnCode gnCreateFramebufferFn(struct gnFramebuffer_t* framebuffer, struct gnOutputDevice_t* device, struct gnFramebufferInfo_t info) {
framebuffer->framebuffer = malloc(sizeof(struct gnPlatformFramebuffer_t));
if (info.attachmentCount != info.renderPassDescriptor->info.attachmentCount) {
gnDebuggerSetErrorMessage(device->instance->debugger, (gnMessageData){
.message = gnCreateString("Attachment count on framebuffer does not equal attachment count on render pass descriptor")
});
return GN_DIVERGENT_RENDERPASS;
}
framebuffer->framebuffer->framebuffer = [[MTLRenderPassDescriptor alloc] init];
[framebuffer->framebuffer->framebuffer setRenderTargetWidth:info.size.x];
[framebuffer->framebuffer->framebuffer setRenderTargetHeight:info.size.y];
for (int i = 0; i < info.renderPassDescriptor->info.attachmentCount; i++) {
gnBool wasDepthStencil = gnFalse;
if (isDepthFormat(info.renderPassDescriptor->info.attachmentInfos[i].format)) {
gnDebuggerSetErrorMessage(device->instance->debugger, (gnMessageData){
.message = gnCreateString("Depth attachments are not currently supported in metal (get on this)")
});
wasDepthStencil = gnTrue;
}
if (isStencilFormat(info.renderPassDescriptor->info.attachmentInfos[i].format)) {
gnDebuggerSetErrorMessage(device->instance->debugger, (gnMessageData){
.message = gnCreateString("Stencil attachments are not currently supported in metal (get on this)")
});
wasDepthStencil = gnTrue;
}
if(!wasDepthStencil) {
MTLRenderPassColorAttachmentDescriptor* color = framebuffer->framebuffer->framebuffer.colorAttachments[i];
color.texture = info.attachments[i].texture->texture;
color.loadAction = mtlGryphnLoadOperation(info.renderPassDescriptor->info.attachmentInfos[i].loadOperation);
color.storeAction = mtlGryphnStoreOperation(info.renderPassDescriptor->info.attachmentInfos[i].storeOperation);
if (color.loadAction == MTLLoadActionClear)
color.clearColor = MTLClearColorMake(0.0, 0.0, 0.0, 1.0);
}
}
return GN_SUCCESS;
}
void gnDestroyFramebufferFn(struct gnFramebuffer_t* framebuffer) {
[framebuffer->framebuffer->framebuffer release];
free(framebuffer->framebuffer);
}

4
src/utils/gryphn_error_code.h
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@@ -25,7 +25,8 @@ typedef enum gnReturnCode_t {
GN_FAILED_TO_CREATE_GRAPHICS_PIPELINE,
GN_UNSUPPORTED_SHADER_MODULE,
GN_UNKNOWN_SUBPASS,
GN_FAILED_TO_CREATE_FRAMEBUFFER
GN_FAILED_TO_CREATE_FRAMEBUFFER,
GN_DIVERGENT_RENDERPASS
} gnReturnCode;
typedef gnReturnCode gnErrorCode;
@@ -56,5 +57,6 @@ static const char* gnErrorCodeToCString(enum gnReturnCode_t returnCode) {
case GN_UNSUPPORTED_SHADER_MODULE: return "GN_UNSUPPORTED_SHADER_MODULE";
case GN_UNKNOWN_SUBPASS: return "GN_UNKNOWN_SUBPASS";
case GN_FAILED_TO_CREATE_FRAMEBUFFER: return "GN_FAILED_TO_CREATE_FRAMEBUFFER";
case GN_DIVERGENT_RENDERPASS: return "GN_DIVERGENT_RENDERPASS";
}
}