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Added support for custom shaders with the GPU renderer

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Added an example of MSDF font rendering with the SDL 2D renderer
This commit is contained in:
Sam Lantinga
2025-03-13 16:41:58 -07:00
parent eb56c8af85
commit 2aee105b43
19 changed files with 1460 additions and 34 deletions
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31
src/render/gpu/SDL_render_gpu.c
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@@ -541,6 +541,8 @@ static void Draw(
}
SDL_GPURenderPass *pass = data->state.render_pass;
SDL_GPURenderState *custom_state = cmd->data.draw.gpu_render_state;
SDL_GPUShader *custom_frag_shader = custom_state ? custom_state->fragment_shader : NULL;
GPU_VertexShaderID v_shader;
GPU_FragmentShaderID f_shader;
@@ -570,12 +572,18 @@ static void Draw(
f_shader = FRAG_SHADER_COLOR;
}
if (custom_frag_shader) {
f_shader = FRAG_SHADER_TEXTURE_CUSTOM;
data->shaders.frag_shaders[FRAG_SHADER_TEXTURE_CUSTOM] = custom_frag_shader;
}
GPU_PipelineParameters pipe_params;
SDL_zero(pipe_params);
pipe_params.blend_mode = cmd->data.draw.blend;
pipe_params.vert_shader = v_shader;
pipe_params.frag_shader = f_shader;
pipe_params.primitive_type = prim;
pipe_params.custom_frag_shader = custom_frag_shader;
if (data->state.render_target) {
pipe_params.attachment_format = ((GPU_TextureData *)data->state.render_target->internal)->format;
@@ -590,15 +598,34 @@ static void Draw(
SDL_BindGPUGraphicsPipeline(pass, pipe);
Uint32 sampler_slot = 0;
if (cmd->data.draw.texture) {
GPU_TextureData *tdata = (GPU_TextureData *)cmd->data.draw.texture->internal;
SDL_GPUTextureSamplerBinding sampler_bind;
SDL_zero(sampler_bind);
sampler_bind.sampler = *SamplerPointer(data, cmd->data.draw.texture_address_mode, cmd->data.draw.texture_scale_mode);
sampler_bind.texture = tdata->texture;
SDL_BindGPUFragmentSamplers(pass, 0, &sampler_bind, 1);
SDL_BindGPUFragmentSamplers(pass, sampler_slot++, &sampler_bind, 1);
}
if (custom_state) {
if (custom_state->num_sampler_bindings > 0) {
SDL_BindGPUFragmentSamplers(pass, sampler_slot, custom_state->sampler_bindings, custom_state->num_sampler_bindings);
}
if (custom_state->num_storage_textures > 0) {
SDL_BindGPUFragmentStorageTextures(pass, 0, custom_state->storage_textures, custom_state->num_storage_textures);
}
if (custom_state->num_storage_buffers > 0) {
SDL_BindGPUFragmentStorageBuffers(pass, 0, custom_state->storage_buffers, custom_state->num_storage_buffers);
}
if (custom_state->num_uniform_buffers > 0) {
for (int i = 0; i < custom_state->num_uniform_buffers; i++) {
SDL_GPURenderStateUniformBuffer *ub = &custom_state->uniform_buffers[i];
SDL_PushGPUFragmentUniformData(data->state.command_buffer, ub->slot_index, ub->data, ub->length);
}
}
} else {
PushFragmentUniforms(data, cmd);
}
PushFragmentUniforms(data, cmd);
SDL_GPUBufferBinding buffer_bind;
SDL_zero(buffer_bind);