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GitHub Repository: hrydgard/ppsspp
 Path: blob/master/GPU/Common/Draw2D.h
Views: 1401
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#pragma once

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#include "GPU/GPU.h"

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#include "Common/GPU/Shader.h"

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// For framebuffer copies and similar things that just require passthrough.

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struct Draw2DVertex {

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	float x;

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	float y;

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	float u;

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	float v;

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};

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enum Draw2DShader {

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	DRAW2D_COPY_COLOR,

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	DRAW2D_COPY_DEPTH,

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	DRAW2D_ENCODE_R16_TO_DEPTH,

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	DRAW2D_565_TO_DEPTH,

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	DRAW2D_565_TO_DEPTH_DESWIZZLE,

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	DRAW2D_COPY_COLOR_RECT2LIN,

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};

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inline RasterChannel Draw2DSourceChannel(Draw2DShader shader) {

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	switch (shader) {

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	case DRAW2D_COPY_DEPTH:

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		return RASTER_DEPTH;

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	case DRAW2D_COPY_COLOR:

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	case DRAW2D_ENCODE_R16_TO_DEPTH:

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	case DRAW2D_565_TO_DEPTH:

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	case DRAW2D_565_TO_DEPTH_DESWIZZLE:

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	default:

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		return RASTER_COLOR;

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	}

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}

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struct Draw2DPipelineInfo {

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	const char *tag;

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	RasterChannel readChannel;

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	RasterChannel writeChannel;

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	Slice<SamplerDef> samplers;

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};

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extern const UniformDef g_draw2Duniforms[5];

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struct Draw2DPipeline {

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	Draw::Pipeline *pipeline;

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	Draw2DPipelineInfo info;

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	char *code;

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	void Release() {

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		pipeline->Release();

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		delete[] code;

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		delete this;

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	}

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};

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class ShaderWriter;

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class Draw2D {

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public:

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	Draw2D(Draw::DrawContext *draw) : draw_(draw) {}

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	void DeviceLost();

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	void DeviceRestore(Draw::DrawContext *draw);

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	Draw2DPipeline *Create2DPipeline(std::function<Draw2DPipelineInfo(ShaderWriter &)> generate);

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	void DrawStrip2D(Draw::Texture *tex, const Draw2DVertex *verts, int vertexCount, bool linearFilter, Draw2DPipeline *pipeline, float texW = 0.0f, float texH = 0.0f, int scaleFactor = 0);

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	void Blit(Draw2DPipeline *pipeline, float srcX1, float srcY1, float srcX2, float srcY2, float dstX1, float dstY1, float dstX2, float dstY2, float srcWidth, float srcHeight, float dstWidth, float dstHeight, bool linear, int scaleFactor);

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	void Ensure2DResources();

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private:

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	Draw::DrawContext *draw_;

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	Draw::SamplerState *draw2DSamplerLinear_ = nullptr;

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	Draw::SamplerState *draw2DSamplerNearest_ = nullptr;

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	Draw::ShaderModule *draw2DVs_ = nullptr;

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};

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