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OpenGL Renderer: Do a minor optimization when running NDS-Style Depth Calculation. 

- As a positive side-effect, generating the geometry shaders now runs quicker too.
This commit is contained in:
rogerman 2021-09-04 17:50:10 -07:00
parent ef35f72172
commit 92fcd1313e
3 changed files with 77 additions and 82 deletions
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57
desmume/src/OGLRender.cpp Normal file → Executable file
View File

@ -329,10 +329,12 @@ uniform bool polyDrawShadow;\n\
\n\
uniform float polyAlpha; \n\
uniform vec2 polyTexScale; \n\
uniform int polyDepthOffsetMode;\n\
\n\
varying vec2 vtxTexCoord; \n\
varying vec4 vtxColor; \n\
varying float isPolyDrawable;\n\
varying float depthOffset;\n\
\n\
void main() \n\
{ \n\
@ -342,6 +344,10 @@ void main() \n\
vtxTexCoord = texScaleMtx * inTexCoord0; \n\
vtxColor = vec4(inColor / 63.0, polyAlpha); \n\
isPolyDrawable = ((polyMode != 3) || polyDrawShadow) ? 1.0 : -1.0;\n\
\n\
depthOffset = (polyDepthOffsetMode == 0) ? 0.0 : ((polyDepthOffsetMode == 1) ? -DEPTH_EQUALS_TEST_TOLERANCE : DEPTH_EQUALS_TEST_TOLERANCE);\n\
depthOffset = depthOffset / 16777215.0;\n\
\n\
gl_Position = inPosition;\n\
} \n\
"};
@ -351,6 +357,7 @@ static const char *GeometryFragShader_100 = {"\
varying vec2 vtxTexCoord;\n\
varying vec4 vtxColor;\n\
varying float isPolyDrawable;\n\
varying float depthOffset;\n\
\n\
uniform sampler2D texRenderObject;\n\
\n\
@ -369,7 +376,6 @@ uniform bool texSingleBitAlpha;\n\
\n\
uniform bool drawModeDepthEqualsTest;\n\
uniform bool polyDrawShadow;\n\
uniform int polyDepthOffsetMode;\n\
\n\
#if USE_DEPTH_LEQUAL_POLYGON_FACING && !DRAW_MODE_OPAQUE\n\
uniform sampler2D inBackFacing;\n\
@ -389,18 +395,15 @@ void main()\n\
\n\
if (!texSingleBitAlpha)\n\
{\n\
if (texDrawOpaque)\n\
if (texDrawOpaque && (polyMode != 1) && (mainTexColor.a <= 0.999))\n\
{\n\
if ( (polyMode != 1) && (mainTexColor.a <= 0.999) )\n\
{\n\
discard;\n\
}\n\
discard;\n\
}\n\
}\n\
#if USE_TEXTURE_SMOOTHING\n\
else\n\
{\n\
if (mainTexColor.a < 0.500)\n\
if (mainTexColor.a < 0.500)\n\
{\n\
mainTexColor.a = 0.0;\n\
}\n\
@ -456,20 +459,11 @@ void main()\n\
// subtle interpolation differences between various GPUs and/or drivers. If the depth calculation is not done\n\
// here, then it is very possible for the user to experience Z-fighting in certain rendering situations.\n\
\n\
#if NEEDS_DEPTH_EQUALS_TEST\n\
float depthOffset = (polyDepthOffsetMode == 0) ? 0.0 : ((polyDepthOffsetMode == 1) ? -DEPTH_EQUALS_TEST_TOLERANCE : DEPTH_EQUALS_TEST_TOLERANCE);\n\
#if ENABLE_W_DEPTH\n\
gl_FragDepth = clamp( ( (4096.0/gl_FragCoord.w) + depthOffset ) / 16777215.0, 0.0, 1.0 );\n\
#else\n\
gl_FragDepth = clamp( ( (floor(gl_FragCoord.z * 4194303.0) * 4.0) + depthOffset ) / 16777215.0, 0.0, 1.0 );\n\
#endif\n\
#if ENABLE_W_DEPTH\n\
gl_FragDepth = clamp( ((1.0/gl_FragCoord.w) * (4096.0/16777215.0)) + depthOffset, 0.0, 1.0 );\n\
#else\n\
#if ENABLE_W_DEPTH\n\
gl_FragDepth = (4096.0/gl_FragCoord.w) / 16777215.0;\n\
#else\n\
// hack: when using z-depth, drop some LSBs so that the overworld map in Dragon Quest IV shows up correctly\n\
gl_FragDepth = (floor(gl_FragCoord.z * 4194303.0) * 4.0) / 16777215.0;\n\
#endif\n\
// hack: when using z-depth, drop some LSBs so that the overworld map in Dragon Quest IV shows up correctly\n\
gl_FragDepth = clamp( (floor(gl_FragCoord.z * 4194303.0) * (4.0/16777215.0)) + depthOffset, 0.0, 1.0 );\n\
#endif\n\
#endif\n\
}\n\
@ -3144,14 +3138,18 @@ Render3DError OpenGLRenderer_1_2::CreateGeometryPrograms()
OGLGeometryFlags programFlags;
programFlags.value = 0;
std::stringstream vtxShaderHeader;
vtxShaderHeader << "#define DEPTH_EQUALS_TEST_TOLERANCE " << DEPTH_EQUALS_TEST_TOLERANCE << ".0\n";
vtxShaderHeader << "\n";
std::string vtxShaderCode = vtxShaderHeader.str() + std::string(GeometryVtxShader_100);
std::stringstream fragShaderHeader;
fragShaderHeader << "#define FRAMEBUFFER_SIZE_X " << this->_framebufferWidth << ".0 \n";
fragShaderHeader << "#define FRAMEBUFFER_SIZE_Y " << this->_framebufferHeight << ".0 \n";
fragShaderHeader << "\n";
fragShaderHeader << "#define DEPTH_EQUALS_TEST_TOLERANCE " << DEPTH_EQUALS_TEST_TOLERANCE << ".0 \n";
fragShaderHeader << "\n";
for (size_t flagsValue = 0; flagsValue < 256; flagsValue++, programFlags.value++)
for (size_t flagsValue = 0; flagsValue < 128; flagsValue++, programFlags.value++)
{
std::stringstream shaderFlags;
shaderFlags << "#define USE_TEXTURE_SMOOTHING " << ((this->_enableTextureSmoothing) ? 1 : 0) << "\n";
@ -3162,7 +3160,6 @@ Render3DError OpenGLRenderer_1_2::CreateGeometryPrograms()
shaderFlags << "#define ENABLE_ALPHA_TEST " << ((programFlags.EnableAlphaTest) ? "true\n" : "false\n");
shaderFlags << "#define ENABLE_TEXTURE_SAMPLING " << ((programFlags.EnableTextureSampling) ? "true\n" : "false\n");
shaderFlags << "#define TOON_SHADING_MODE " << ((programFlags.ToonShadingMode) ? 1 : 0) << "\n";
shaderFlags << "#define NEEDS_DEPTH_EQUALS_TEST " << ((programFlags.NeedsDepthEqualsTest) ? 1 : 0) << "\n";
shaderFlags << "#define ENABLE_FOG " << ((programFlags.EnableFog) ? 1 : 0) << "\n";
shaderFlags << "#define ENABLE_EDGE_MARK " << ((programFlags.EnableEdgeMark) ? 1 : 0) << "\n";
shaderFlags << "#define DRAW_MODE_OPAQUE " << ((programFlags.OpaqueDrawMode) ? 1 : 0) << "\n";
@ -3177,7 +3174,7 @@ Render3DError OpenGLRenderer_1_2::CreateGeometryPrograms()
error = this->ShaderProgramCreate(OGLRef.vertexGeometryShaderID,
OGLRef.fragmentGeometryShaderID[flagsValue],
OGLRef.programGeometryID[flagsValue],
GeometryVtxShader_100,
vtxShaderCode.c_str(),
fragShaderCode.c_str());
if (error != OGLERROR_NOERR)
{
@ -3244,7 +3241,7 @@ void OpenGLRenderer_1_2::DestroyGeometryPrograms()
OGLRenderRef &OGLRef = *this->ref;
for (size_t flagsValue = 0; flagsValue < 256; flagsValue++)
for (size_t flagsValue = 0; flagsValue < 128; flagsValue++)
{
if (OGLRef.programGeometryID[flagsValue] == 0)
{
@ -4386,7 +4383,6 @@ Render3DError OpenGLRenderer_1_2::BeginRender(const GFX3D &engine)
// Generate the clipped polygon list.
bool renderNeedsToonTable = false;
bool renderNeedsDepthEqualsTest = false;
for (size_t i = 0, vertIndexCount = 0; i < this->_clippedPolyCount; i++)
{
@ -4472,7 +4468,6 @@ Render3DError OpenGLRenderer_1_2::BeginRender(const GFX3D &engine)
}
renderNeedsToonTable = (renderNeedsToonTable || (thePoly.attribute.Mode == POLYGON_MODE_TOONHIGHLIGHT)) && this->isShaderSupported;
renderNeedsDepthEqualsTest = renderNeedsDepthEqualsTest || (thePoly.attribute.DepthEqualTest_Enable != 0);
this->_isPolyFrontFacing[i] = (facing < 0);
// Get the texture that is to be attached to this polygon.
@ -4537,11 +4532,11 @@ Render3DError OpenGLRenderer_1_2::BeginRender(const GFX3D &engine)
if (this->isShaderSupported)
{
this->_geometryProgramFlags.value = 0;
this->_geometryProgramFlags.EnableWDepth = (engine.renderState.wbuffer) ? 1 : 0;
this->_geometryProgramFlags.EnableAlphaTest = (engine.renderState.enableAlphaTest) ? 1 : 0;
this->_geometryProgramFlags.EnableTextureSampling = (this->_enableTextureSampling) ? 1 : 0;
this->_geometryProgramFlags.ToonShadingMode = (engine.renderState.shading) ? 1 : 0;
this->_geometryProgramFlags.NeedsDepthEqualsTest = (renderNeedsDepthEqualsTest) ? 1 : 0;
this->_geometryProgramFlags.EnableFog = (this->_enableFog) ? 1 : 0;
this->_geometryProgramFlags.EnableEdgeMark = (this->_enableEdgeMark) ? 1 : 0;
this->_geometryProgramFlags.OpaqueDrawMode = 1;
@ -5654,7 +5649,6 @@ Render3DError OpenGLRenderer_2_0::BeginRender(const GFX3D &engine)
// Generate the clipped polygon list.
bool renderNeedsToonTable = false;
bool renderNeedsDepthEqualsTest = false;
for (size_t i = 0, vertIndexCount = 0; i < this->_clippedPolyCount; i++)
{
@ -5702,7 +5696,6 @@ Render3DError OpenGLRenderer_2_0::BeginRender(const GFX3D &engine)
}
renderNeedsToonTable = renderNeedsToonTable || (thePoly.attribute.Mode == POLYGON_MODE_TOONHIGHLIGHT);
renderNeedsDepthEqualsTest = renderNeedsDepthEqualsTest || (thePoly.attribute.DepthEqualTest_Enable != 0);
this->_isPolyFrontFacing[i] = (facing < 0);
// Get the texture that is to be attached to this polygon.
@ -5763,11 +5756,11 @@ Render3DError OpenGLRenderer_2_0::BeginRender(const GFX3D &engine)
}
// Setup render states
this->_geometryProgramFlags.value = 0;
this->_geometryProgramFlags.EnableWDepth = (engine.renderState.wbuffer) ? 1 : 0;
this->_geometryProgramFlags.EnableAlphaTest = (engine.renderState.enableAlphaTest) ? 1 : 0;
this->_geometryProgramFlags.EnableTextureSampling = (this->_enableTextureSampling) ? 1 : 0;
this->_geometryProgramFlags.ToonShadingMode = (engine.renderState.shading) ? 1 : 0;
this->_geometryProgramFlags.NeedsDepthEqualsTest = (renderNeedsDepthEqualsTest) ? 1 : 0;
this->_geometryProgramFlags.EnableFog = (this->_enableFog) ? 1 : 0;
this->_geometryProgramFlags.EnableEdgeMark = (this->_enableEdgeMark) ? 1 : 0;
this->_geometryProgramFlags.OpaqueDrawMode = 1;

67
desmume/src/OGLRender.h Normal file → Executable file
View File

@ -1,7 +1,7 @@
/*
Copyright (C) 2006 yopyop
Copyright (C) 2006-2007 shash
Copyright (C) 2008-2019 DeSmuME team
Copyright (C) 2008-2021 DeSmuME team
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@ -432,35 +432,44 @@ union OGLPolyStates
union OGLGeometryFlags
{
u8 value;
struct
{
#ifndef MSB_FIRST
u8 EnableWDepth:1;
u8 EnableAlphaTest:1;
u8 EnableTextureSampling:1;
u8 ToonShadingMode:1;
u8 NeedsDepthEqualsTest:1;
u8 EnableFog:1;
u8 EnableEdgeMark:1;
u8 OpaqueDrawMode:1;
#else
u8 OpaqueDrawMode:1;
u8 EnableEdgeMark:1;
u8 EnableFog:1;
u8 NeedsDepthEqualsTest:1;
u8 ToonShadingMode:1;
u8 EnableTextureSampling:1;
u8 EnableAlphaTest:1;
u8 EnableWDepth:1;
#endif
};
struct
{
u8 :5;
u8 DrawBuffersMode:3;
};
u8 EnableFog:1;
u8 EnableEdgeMark:1;
u8 OpaqueDrawMode:1;
u8 EnableWDepth:1;
u8 EnableAlphaTest:1;
u8 EnableTextureSampling:1;
u8 ToonShadingMode:1;
u8 unused:1;
};
struct
{
u8 DrawBuffersMode:3;
u8 :5;
};
#else
struct
{
u8 unused:1;
u8 ToonShadingMode:1;
u8 EnableTextureSampling:1;
u8 EnableAlphaTest:1;
u8 EnableWDepth:1;
u8 OpaqueDrawMode:1;
u8 EnableEdgeMark:1;
u8 EnableFog:1;
};
struct
{
u8 :5;
u8 DrawBuffersMode:3;
};
#endif
};
typedef OGLGeometryFlags OGLGeometryFlags;
@ -529,8 +538,8 @@ struct OGLRenderRef
// Shader states
GLuint vertexGeometryShaderID;
GLuint fragmentGeometryShaderID[256];
GLuint programGeometryID[256];
GLuint fragmentGeometryShaderID[128];
GLuint programGeometryID[128];
GLuint vtxShaderGeometryZeroDstAlphaID;
GLuint fragShaderGeometryZeroDstAlphaID;

35
desmume/src/OGLRender_3_2.cpp
View File

@ -132,6 +132,7 @@ uniform isamplerBuffer PolyStates;\n\
#endif\n\
uniform int polyIndex;\n\
uniform bool polyDrawShadow;\n\
uniform int polyDepthOffsetMode;\n\
\n\
out vec2 vtxTexCoord;\n\
out vec4 vtxColor;\n\
@ -143,6 +144,7 @@ flat out int polyMode;\n\
flat out int polyID;\n\
flat out int texSingleBitAlpha;\n\
flat out int isPolyDrawable;\n\
flat out float depthOffset;\n\
\n\
void main()\n\
{\n\
@ -168,6 +170,9 @@ void main()\n\
\n\
isPolyDrawable = int((polyMode != 3) || polyDrawShadow);\n\
\n\
depthOffset = (polyDepthOffsetMode == 0) ? 0.0 : ((polyDepthOffsetMode == 1) ? -DEPTH_EQUALS_TEST_TOLERANCE : DEPTH_EQUALS_TEST_TOLERANCE);\n\
depthOffset = depthOffset / 16777215.0;\n\
\n\
mat2 texScaleMtx = mat2( vec2(polyTexScale.x, 0.0), \n\
vec2( 0.0, polyTexScale.y)); \n\
\n\
@ -189,6 +194,7 @@ flat in int polyMode;\n\
flat in int polyID;\n\
flat in int texSingleBitAlpha;\n\
flat in int isPolyDrawable;\n\
flat in float depthOffset;\n\
\n\
layout (std140) uniform RenderStates\n\
{\n\
@ -241,7 +247,6 @@ uniform sampler2D texRenderObject;\n\
uniform bool texDrawOpaque;\n\
uniform bool drawModeDepthEqualsTest;\n\
uniform bool polyDrawShadow;\n\
uniform int polyDepthOffsetMode;\n\
\n\
#if DRAW_MODE_OPAQUE\n\
out vec4 outBackFacing;\n\
@ -257,7 +262,7 @@ out vec4 outPolyID;\n\
#if ENABLE_FOG\n\
out vec4 outFogAttributes;\n\
#endif\n\
#if IS_CONSERVATIVE_DEPTH_SUPPORTED && (USE_NDS_DEPTH_CALCULATION || ENABLE_FOG) && !NEEDS_DEPTH_EQUALS_TEST && !ENABLE_W_DEPTH\n\
#if IS_CONSERVATIVE_DEPTH_SUPPORTED && (USE_NDS_DEPTH_CALCULATION || ENABLE_FOG) && !ENABLE_W_DEPTH\n\
layout (depth_less) out float gl_FragDepth;\n\
#endif\n\
\n\
@ -346,20 +351,11 @@ void main()\n\
// subtle interpolation differences between various GPUs and/or drivers. If the depth calculation is not done\n\
// here, then it is very possible for the user to experience Z-fighting in certain rendering situations.\n\
\n\
#if NEEDS_DEPTH_EQUALS_TEST\n\
float depthOffset = (polyDepthOffsetMode == 0) ? 0.0 : ((polyDepthOffsetMode == 1) ? -DEPTH_EQUALS_TEST_TOLERANCE : DEPTH_EQUALS_TEST_TOLERANCE);\n\
#if ENABLE_W_DEPTH\n\
gl_FragDepth = clamp( ( (4096.0/gl_FragCoord.w) + depthOffset ) / 16777215.0, 0.0, 1.0 );\n\
#else\n\
gl_FragDepth = clamp( ( (floor(gl_FragCoord.z * 4194303.0) * 4.0) + depthOffset ) / 16777215.0, 0.0, 1.0 );\n\
#endif\n\
#if ENABLE_W_DEPTH\n\
gl_FragDepth = clamp( ((1.0/gl_FragCoord.w) * (4096.0/16777215.0)) + depthOffset, 0.0, 1.0 );\n\
#else\n\
#if ENABLE_W_DEPTH\n\
gl_FragDepth = (4096.0/gl_FragCoord.w) / 16777215.0;\n\
#else\n\
// hack: when using z-depth, drop some LSBs so that the overworld map in Dragon Quest IV shows up correctly\n\
gl_FragDepth = (floor(gl_FragCoord.z * 4194303.0) * 4.0) / 16777215.0;\n\
#endif\n\
// hack: when using z-depth, drop some LSBs so that the overworld map in Dragon Quest IV shows up correctly\n\
gl_FragDepth = clamp( (floor(gl_FragCoord.z * 4194303.0) * (4.0/16777215.0)) + depthOffset, 0.0, 1.0 );\n\
#endif\n\
#endif\n\
}\n\
@ -1428,6 +1424,7 @@ Render3DError OpenGLRenderer_3_2::CreateGeometryPrograms()
}
vtxShaderHeader << "\n";
vtxShaderHeader << "#define IS_USING_UBO_POLY_STATES " << ((OGLRef.uboPolyStatesID != 0) ? 1 : 0) << "\n";
vtxShaderHeader << "#define DEPTH_EQUALS_TEST_TOLERANCE " << DEPTH_EQUALS_TEST_TOLERANCE << ".0\n";
vtxShaderHeader << "\n";
std::string vtxShaderCode = vtxShaderHeader.str() + std::string(GeometryVtxShader_150);
@ -1446,10 +1443,9 @@ Render3DError OpenGLRenderer_3_2::CreateGeometryPrograms()
fragShaderHeader << "#version 150\n";
}
fragShaderHeader << "#define IS_CONSERVATIVE_DEPTH_SUPPORTED " << ((this->_isConservativeDepthSupported || this->_isConservativeDepthAMDSupported) ? 1 : 0) << "\n";
fragShaderHeader << "#define DEPTH_EQUALS_TEST_TOLERANCE " << DEPTH_EQUALS_TEST_TOLERANCE << ".0\n";
fragShaderHeader << "\n";
for (size_t flagsValue = 0; flagsValue < 256; flagsValue++, programFlags.value++)
for (size_t flagsValue = 0; flagsValue < 128; flagsValue++, programFlags.value++)
{
std::stringstream shaderFlags;
shaderFlags << "#define USE_TEXTURE_SMOOTHING " << ((this->_enableTextureSmoothing) ? 1 : 0) << "\n";
@ -1460,7 +1456,6 @@ Render3DError OpenGLRenderer_3_2::CreateGeometryPrograms()
shaderFlags << "#define ENABLE_ALPHA_TEST " << ((programFlags.EnableAlphaTest) ? "true\n" : "false\n");
shaderFlags << "#define ENABLE_TEXTURE_SAMPLING " << ((programFlags.EnableTextureSampling) ? "true\n" : "false\n");
shaderFlags << "#define TOON_SHADING_MODE " << ((programFlags.ToonShadingMode) ? 1 : 0) << "\n";
shaderFlags << "#define NEEDS_DEPTH_EQUALS_TEST " << ((programFlags.NeedsDepthEqualsTest) ? 1 : 0) << "\n";
shaderFlags << "#define ENABLE_FOG " << ((programFlags.EnableFog) ? 1 : 0) << "\n";
shaderFlags << "#define ENABLE_EDGE_MARK " << ((programFlags.EnableEdgeMark) ? 1 : 0) << "\n";
shaderFlags << "#define DRAW_MODE_OPAQUE " << ((programFlags.OpaqueDrawMode) ? 1 : 0) << "\n";
@ -2331,7 +2326,6 @@ Render3DError OpenGLRenderer_3_2::BeginRender(const GFX3D &engine)
// Set up the polygon states.
bool renderNeedsToonTable = false;
bool renderNeedsDepthEqualsTest = false;
for (size_t i = 0, vertIndexCount = 0; i < this->_clippedPolyCount; i++)
{
@ -2379,7 +2373,6 @@ Render3DError OpenGLRenderer_3_2::BeginRender(const GFX3D &engine)
}
renderNeedsToonTable = renderNeedsToonTable || (thePoly.attribute.Mode == POLYGON_MODE_TOONHIGHLIGHT);
renderNeedsDepthEqualsTest = renderNeedsDepthEqualsTest || (thePoly.attribute.DepthEqualTest_Enable != 0);
this->_isPolyFrontFacing[i] = (facing < 0);
// Get the texture that is to be attached to this polygon.
@ -2486,11 +2479,11 @@ Render3DError OpenGLRenderer_3_2::BeginRender(const GFX3D &engine)
}
// Set up the default draw call states.
this->_geometryProgramFlags.value = 0;
this->_geometryProgramFlags.EnableWDepth = (engine.renderState.wbuffer) ? 1 : 0;
this->_geometryProgramFlags.EnableAlphaTest = (engine.renderState.enableAlphaTest) ? 1 : 0;
this->_geometryProgramFlags.EnableTextureSampling = (this->_enableTextureSampling) ? 1 : 0;
this->_geometryProgramFlags.ToonShadingMode = (engine.renderState.shading) ? 1 : 0;
this->_geometryProgramFlags.NeedsDepthEqualsTest = (renderNeedsDepthEqualsTest) ? 1 : 0;
this->_geometryProgramFlags.EnableFog = (this->_enableFog) ? 1 : 0;
this->_geometryProgramFlags.EnableEdgeMark = (this->_enableEdgeMark) ? 1 : 0;
this->_geometryProgramFlags.OpaqueDrawMode = 1;