Sergio Valor
af0276255e
- PostFXUniforms struct (vignette_strength, chroma_strength, scanline_strength, time) - Shader MSL actualitzat: aberració cromàtica RGB + scanlines sin-wave + vinyeta paramètrica - Pipeline postfx declara num_uniform_buffers=1 (buffer(0) en MSL) - Engine acumula temps i fa SDL_PushGPUFragmentUniformData cada frame - Valors per defecte: vignette=1.5, chroma=0, scanlines=0 (comportament idèntic a l'anterior) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
49 lines
2.2 KiB
C++
49 lines
2.2 KiB
C++
#pragma once
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#include <SDL3/SDL_gpu.h>
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// ============================================================================
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// PostFXUniforms — pushed to the fragment stage each frame via
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// SDL_PushGPUFragmentUniformData(pass, 0, &uniforms, sizeof(PostFXUniforms))
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// MSL binding: constant PostFXUniforms& u [[buffer(0)]]
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// ============================================================================
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struct PostFXUniforms {
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float vignette_strength; // 0 = none, 1.5 = default subtle
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float chroma_strength; // 0 = off, 1 = full chromatic aberration
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float scanline_strength; // 0 = off, 1 = full scanlines
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float time; // accumulated seconds (for future animations)
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};
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// ============================================================================
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// GpuPipeline — Creates and owns the graphics pipelines used by the engine.
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//
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// sprite_pipeline_ : textured quads, alpha blending.
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// Vertex layout: GpuVertex (pos float2, uv float2, col float4).
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// postfx_pipeline_ : full-screen triangle, no vertex buffer, no blend.
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// Reads offscreen texture, writes to swapchain.
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// Accepts PostFXUniforms via fragment uniform buffer slot 0.
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// ============================================================================
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class GpuPipeline {
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public:
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// target_format: pass SDL_GetGPUSwapchainTextureFormat() result.
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// offscreen_format: format of the offscreen render target.
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bool init(SDL_GPUDevice* device,
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SDL_GPUTextureFormat target_format,
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SDL_GPUTextureFormat offscreen_format);
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void destroy(SDL_GPUDevice* device);
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SDL_GPUGraphicsPipeline* spritePipeline() const { return sprite_pipeline_; }
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SDL_GPUGraphicsPipeline* postfxPipeline() const { return postfx_pipeline_; }
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private:
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SDL_GPUShader* createShader(SDL_GPUDevice* device,
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const char* msl_source,
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const char* entrypoint,
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SDL_GPUShaderStage stage,
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Uint32 num_samplers,
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Uint32 num_uniform_buffers);
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SDL_GPUGraphicsPipeline* sprite_pipeline_ = nullptr;
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SDL_GPUGraphicsPipeline* postfx_pipeline_ = nullptr;
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};
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