mirror of
https://github.com/hrydgard/ppsspp.git
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503 lines
18 KiB
C++
503 lines
18 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include <cstdio>
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#include <cstdlib>
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#include <locale.h>
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#include "gfx_es2/gpu_features.h"
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#if defined(_WIN32) && defined(_DEBUG)
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#include "Common/CommonWindows.h"
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#endif
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#include "base/stringutil.h"
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#include "Common/Vulkan/VulkanLoader.h"
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#include "Core/Config.h"
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#include "GPU/ge_constants.h"
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#include "GPU/GPUState.h"
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#include "GPU/Common/ShaderId.h"
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#include "GPU/Common/VertexDecoderCommon.h"
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#include "GPU/Vulkan/VertexShaderGeneratorVulkan.h"
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#include "GPU/Vulkan/PipelineManagerVulkan.h"
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#include "GPU/Vulkan/ShaderManagerVulkan.h"
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static const char *vulkan_glsl_preamble =
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"#version 400\n"
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"#extension GL_ARB_separate_shader_objects : enable\n"
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"#extension GL_ARB_shading_language_420pack : enable\n\n";
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// "Varying" layout - must match fragment shader
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// color0 = 0
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// color1 = 1
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// texcoord = 2
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// fog = 3
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#undef WRITE
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#define WRITE p+=sprintf
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static const char * const boneWeightDecl[9] = {
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"#ERROR#",
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"layout(location = 3) in float w1;\n",
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"layout(location = 3) in vec2 w1;\n",
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"layout(location = 3) in vec3 w1;\n",
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"layout(location = 3) in vec4 w1;\n",
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"layout(location = 3) in vec4 w1;\nlayout(location = 4) in float w2;\n",
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"layout(location = 3) in vec4 w1;\nlayout(location = 4) in vec2 w2;\n",
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"layout(location = 3) in vec4 w1;\nlayout(location = 4) in vec3 w2;\n",
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"layout(location = 3) in vec4 w1;\nlayout(location = 4) in vec4 w2;\n",
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};
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enum DoLightComputation {
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LIGHT_OFF,
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LIGHT_SHADE,
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LIGHT_FULL,
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};
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// Depth range and viewport
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//
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// After the multiplication with the projection matrix, we have a 4D vector in clip space.
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// In OpenGL, Z is from -1 to 1, while in D3D, Z is from 0 to 1.
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// PSP appears to use the OpenGL convention. As Z is from -1 to 1, and the viewport is represented
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// by a center and a scale, to find the final Z value, all we need to do is to multiply by ZScale and
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// add ZCenter - these are properly scaled to directly give a Z value in [0, 65535].
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//
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// z = vec.z * ViewportZScale + ViewportZCenter;
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//
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// That will give us the final value between 0 and 65535, which we can simply floor to simulate
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// the limited precision of the PSP's depth buffer. Then we convert it back:
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// z = floor(z);
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//
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// vec.z = (z - ViewportZCenter) / ViewportZScale;
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//
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// Now, the regular machinery will take over and do the calculation again.
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//
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// All this above is for full transform mode.
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// In through mode, the Z coordinate just goes straight through and there is no perspective division.
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// We simulate this of course with pretty much an identity matrix. Rounding Z becomes very easy.
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//
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// TODO: Skip all this if we can actually get a 16-bit depth buffer along with stencil, which
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// is a bit of a rare configuration, although quite common on mobile.
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bool GenerateVulkanGLSLVertexShader(const ShaderID &id, char *buffer, bool *usesLighting) {
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char *p = buffer;
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WRITE(p, "%s", vulkan_glsl_preamble);
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bool highpFog = false;
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bool highpTexcoord = false;
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bool isModeThrough = id.Bit(VS_BIT_IS_THROUGH);
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bool lmode = id.Bit(VS_BIT_LMODE) && !isModeThrough; // TODO: Different expression than in shaderIDgen
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bool doTexture = id.Bit(VS_BIT_DO_TEXTURE);
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bool doTextureProjection = id.Bit(VS_BIT_DO_TEXTURE_PROJ);
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GETexMapMode uvGenMode = static_cast<GETexMapMode>(id.Bits(VS_BIT_UVGEN_MODE, 2));
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// this is only valid for some settings of uvGenMode
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GETexProjMapMode uvProjMode = static_cast<GETexProjMapMode>(id.Bits(VS_BIT_UVPROJ_MODE, 2));
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bool doShadeMapping = uvGenMode == GE_TEXMAP_ENVIRONMENT_MAP;
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bool doFlatShading = id.Bit(VS_BIT_FLATSHADE);
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bool useHWTransform = id.Bit(VS_BIT_USE_HW_TRANSFORM);
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bool hasColor = id.Bit(VS_BIT_HAS_COLOR) || !useHWTransform;
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bool hasNormal = id.Bit(VS_BIT_HAS_NORMAL) && useHWTransform;
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bool hasTexcoord = id.Bit(VS_BIT_HAS_TEXCOORD) || !useHWTransform;
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bool enableFog = id.Bit(VS_BIT_ENABLE_FOG);
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bool throughmode = id.Bit(VS_BIT_IS_THROUGH);
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bool flipNormal = id.Bit(VS_BIT_NORM_REVERSE);
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int ls0 = id.Bits(VS_BIT_LS0, 2);
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int ls1 = id.Bits(VS_BIT_LS1, 2);
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bool enableBones = id.Bit(VS_BIT_ENABLE_BONES);
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bool enableLighting = id.Bit(VS_BIT_LIGHTING_ENABLE);
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int matUpdate = id.Bits(VS_BIT_MATERIAL_UPDATE, 3);
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// The uniforms are passed in as three "clumps" that may or may not be present.
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// We will memcpy the parts into place in a big buffer so we can be quite dynamic about what parts
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// are present and what parts aren't, but we will not be ultra detailed about it.
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*usesLighting = enableLighting || doShadeMapping;
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WRITE(p, "\n");
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WRITE(p, "layout (std140, set = 0, binding = 2) uniform baseVars {\n%s} base;\n", ub_baseStr);
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if (enableLighting || doShadeMapping)
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WRITE(p, "layout (std140, set = 0, binding = 3) uniform lightVars {\n%s} light;\n", ub_vs_lightsStr);
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if (enableBones)
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WRITE(p, "layout (std140, set = 0, binding = 4) uniform boneVars {\n%s} bone;\n", ub_vs_bonesStr);
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const char *shading = doFlatShading ? "flat " : "";
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DoLightComputation doLight[4] = { LIGHT_OFF, LIGHT_OFF, LIGHT_OFF, LIGHT_OFF };
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if (useHWTransform) {
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int shadeLight0 = doShadeMapping ? ls0 : -1;
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int shadeLight1 = doShadeMapping ? ls1 : -1;
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for (int i = 0; i < 4; i++) {
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if (i == shadeLight0 || i == shadeLight1)
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doLight[i] = LIGHT_SHADE;
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if (id.Bit(VS_BIT_LIGHTING_ENABLE) && id.Bit(VS_BIT_LIGHT0_ENABLE + i))
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doLight[i] = LIGHT_FULL;
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}
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}
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int numBoneWeights = 0;
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int boneWeightScale = id.Bits(VS_BIT_WEIGHT_FMTSCALE, 2);
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if (enableBones) {
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numBoneWeights = 1 + id.Bits(VS_BIT_BONES, 3);
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WRITE(p, "%s", boneWeightDecl[numBoneWeights]);
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}
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if (useHWTransform)
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WRITE(p, "layout (location = %d) in vec3 position;\n", PspAttributeLocation::POSITION);
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else
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// we pass the fog coord in w
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WRITE(p, "layout (location = %d) in vec4 position;\n", PspAttributeLocation::POSITION);
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if (useHWTransform && hasNormal)
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WRITE(p, "layout (location = %d) in vec3 normal;\n", PspAttributeLocation::NORMAL);
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if (doTexture && hasTexcoord) {
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if (!useHWTransform && doTextureProjection && !throughmode)
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WRITE(p, "layout (location = %d) in vec3 texcoord;\n", PspAttributeLocation::TEXCOORD);
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else
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WRITE(p, "layout (location = %d) in vec2 texcoord;\n", PspAttributeLocation::TEXCOORD);
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}
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if (hasColor) {
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WRITE(p, "layout (location = %d) in vec4 color0;\n", PspAttributeLocation::COLOR0);
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if (lmode && !useHWTransform) // only software transform supplies color1 as vertex data
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WRITE(p, "layout (location = %d) in vec3 color1;\n", PspAttributeLocation::COLOR1);
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}
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WRITE(p, "layout (location = 1) %sout vec4 v_color0;\n", shading);
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if (lmode) {
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WRITE(p, "layout (location = 2) %sout vec3 v_color1;\n", shading);
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}
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if (doTexture) {
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if (doTextureProjection) {
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WRITE(p, "layout (location = 0) out vec3 v_texcoord;\n");
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} else {
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WRITE(p, "layout (location = 0) out vec2 v_texcoord;\n");
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}
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}
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if (enableFog) {
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// See the fragment shader generator
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WRITE(p, "layout (location = 3) out float v_fogdepth;\n");
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}
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// See comment above this function (GenerateVertexShader).
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if (!isModeThrough && gstate_c.Supports(GPU_ROUND_DEPTH_TO_16BIT)) {
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// Apply the projection and viewport to get the Z buffer value, floor to integer, undo the viewport and projection.
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WRITE(p, "\nvec4 depthRoundZVP(vec4 v) {\n");
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WRITE(p, " float z = v.z / v.w;\n");
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WRITE(p, " z = z * base.depthRange.x + base.depthRange.y;\n");
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WRITE(p, " z = floor(z);\n");
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WRITE(p, " z = (z - base.depthRange.z) * base.depthRange.w;\n");
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WRITE(p, " return vec4(v.x, v.y, z * v.w, v.w);\n");
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WRITE(p, "}\n\n");
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}
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WRITE(p, "out gl_PerVertex { vec4 gl_Position; };\n");
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WRITE(p, "void main() {\n");
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if (!useHWTransform) {
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// Simple pass-through of vertex data to fragment shader
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if (doTexture) {
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if (throughmode && doTextureProjection) {
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WRITE(p, " v_texcoord = vec3(texcoord, 1.0);\n");
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} else {
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WRITE(p, " v_texcoord = texcoord;\n");
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}
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}
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if (hasColor) {
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WRITE(p, " v_color0 = color0;\n");
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if (lmode)
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WRITE(p, " v_color1 = color1;\n");
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} else {
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WRITE(p, " v_color0 = base.matambientalpha;\n");
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if (lmode)
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WRITE(p, " v_color1 = vec3(0.0);\n");
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}
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if (enableFog) {
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WRITE(p, " v_fogdepth = position.w;\n");
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}
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if (isModeThrough) {
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WRITE(p, " gl_Position = base.proj_through_mtx * vec4(position.xyz, 1.0);\n");
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} else {
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// The viewport is used in this case, so need to compensate for that.
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if (gstate_c.Supports(GPU_ROUND_DEPTH_TO_16BIT)) {
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WRITE(p, " gl_Position = depthRoundZVP(base.proj_mtx * vec4(position.xyz, 1.0));\n");
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} else {
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WRITE(p, " gl_Position = base.proj_mtx * vec4(position.xyz, 1.0);\n");
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}
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}
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} else {
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// Step 1: World Transform / Skinning
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if (!enableBones) {
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// No skinning, just standard T&L.
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WRITE(p, " vec3 worldpos = (base.world_mtx * vec4(position.xyz, 1.0)).xyz;\n");
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if (hasNormal)
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WRITE(p, " mediump vec3 worldnormal = normalize((base.world_mtx * vec4(%snormal, 0.0)).xyz);\n", flipNormal ? "-" : "");
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else
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WRITE(p, " mediump vec3 worldnormal = vec3(0.0, 0.0, 1.0);\n");
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} else {
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static const char *rescale[4] = { "", " * 1.9921875", " * 1.999969482421875", "" }; // 2*127.5f/128.f, 2*32767.5f/32768.f, 1.0f};
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const char *factor = rescale[boneWeightScale];
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static const char * const boneWeightAttr[8] = {
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"w1.x", "w1.y", "w1.z", "w1.w",
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"w2.x", "w2.y", "w2.z", "w2.w",
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};
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WRITE(p, " mat4 skinMatrix = w1.x * bone.m[0];\n");
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if (numBoneWeights > 1) {
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for (int i = 1; i < numBoneWeights; i++) {
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WRITE(p, " skinMatrix += %s * bone.m[%i];\n", boneWeightAttr[i], i);
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}
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}
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WRITE(p, ";\n");
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// Trying to simplify this results in bugs in LBP...
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WRITE(p, " vec3 skinnedpos = (skinMatrix * vec4(position, 1.0)).xyz %s;\n", factor);
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WRITE(p, " vec3 worldpos = (base.world_mtx * vec4(skinnedpos, 1.0)).xyz;\n");
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if (hasNormal) {
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WRITE(p, " mediump vec3 skinnednormal = (skinMatrix * vec4(%snormal, 0.0)).xyz %s;\n", flipNormal ? "-" : "", factor);
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} else {
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WRITE(p, " mediump vec3 skinnednormal = (skinMatrix * vec4(0.0, 0.0, %s1.0, 0.0)).xyz %s;\n", flipNormal ? "-" : "", factor);
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}
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WRITE(p, " mediump vec3 worldnormal = normalize((base.world_mtx * vec4(skinnednormal, 0.0)).xyz);\n");
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}
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WRITE(p, " vec4 viewPos = base.view_mtx * vec4(worldpos, 1.0);\n");
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// Final view and projection transforms.
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if (gstate_c.Supports(GPU_ROUND_DEPTH_TO_16BIT)) {
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WRITE(p, " gl_Position = depthRoundZVP(base.proj_mtx * viewPos);\n");
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} else {
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WRITE(p, " gl_Position = base.proj_mtx * viewPos;\n");
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}
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// TODO: Declare variables for dots for shade mapping if needed.
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const char *ambientStr = ((matUpdate & 1) && hasColor) ? "color0" : "base.matambientalpha";
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const char *diffuseStr = ((matUpdate & 2) && hasColor) ? "color0.rgb" : "light.matdiffuse";
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const char *specularStr = ((matUpdate & 4) && hasColor) ? "color0.rgb" : "light.matspecular.rgb";
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bool diffuseIsZero = true;
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bool specularIsZero = true;
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bool distanceNeeded = false;
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if (enableLighting) {
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WRITE(p, " vec4 lightSum0 = light.globalAmbient * %s + vec4(light.matemissive, 0.0);\n", ambientStr);
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for (int i = 0; i < 4; i++) {
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GELightType type = static_cast<GELightType>(id.Bits(VS_BIT_LIGHT0_TYPE + 4 * i, 2));
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GELightComputation comp = static_cast<GELightComputation>(id.Bits(VS_BIT_LIGHT0_COMP + 4 * i, 2));
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if (doLight[i] != LIGHT_FULL)
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continue;
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diffuseIsZero = false;
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if (comp != GE_LIGHTCOMP_ONLYDIFFUSE)
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specularIsZero = false;
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if (type != GE_LIGHTTYPE_DIRECTIONAL)
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distanceNeeded = true;
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}
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if (!specularIsZero) {
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WRITE(p, " vec3 lightSum1 = vec3(0.0);\n");
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}
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if (!diffuseIsZero) {
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WRITE(p, " vec3 toLight;\n");
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WRITE(p, " vec3 diffuse;\n");
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}
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if (distanceNeeded) {
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WRITE(p, " float distance;\n");
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WRITE(p, " float lightScale;\n");
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}
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}
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// Calculate lights if needed. If shade mapping is enabled, lights may need to be
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// at least partially calculated.
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for (int i = 0; i < 4; i++) {
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if (doLight[i] != LIGHT_FULL)
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continue;
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GELightType type = static_cast<GELightType>(id.Bits(VS_BIT_LIGHT0_TYPE + 4 * i, 2));
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GELightComputation comp = static_cast<GELightComputation>(id.Bits(VS_BIT_LIGHT0_COMP + 4 * i, 2));
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if (type == GE_LIGHTTYPE_DIRECTIONAL) {
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// We prenormalize light positions for directional lights.
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WRITE(p, " toLight = light.pos[%i];\n", i);
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} else {
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WRITE(p, " toLight = light.pos[%i] - worldpos;\n", i);
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WRITE(p, " distance = length(toLight);\n");
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WRITE(p, " toLight /= distance;\n");
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}
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bool doSpecular = comp != GE_LIGHTCOMP_ONLYDIFFUSE;
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bool poweredDiffuse = comp == GE_LIGHTCOMP_BOTHWITHPOWDIFFUSE;
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WRITE(p, " mediump float dot%i = max(dot(toLight, worldnormal), 0.0);\n", i);
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if (poweredDiffuse) {
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// pow(0.0, 0.0) may be undefined, but the PSP seems to treat it as 1.0.
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// Seen in Tales of the World: Radiant Mythology (#2424.)
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WRITE(p, " if (dot%i == 0.0 && light.matspecular.a == 0.0) {\n", i);
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WRITE(p, " dot%i = 1.0;\n", i);
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WRITE(p, " } else {\n");
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WRITE(p, " dot%i = pow(dot%i, light.matspecular.a);\n", i, i);
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WRITE(p, " }\n");
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}
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const char *timesLightScale = " * lightScale";
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// Attenuation
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switch (type) {
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case GE_LIGHTTYPE_DIRECTIONAL:
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timesLightScale = "";
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break;
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case GE_LIGHTTYPE_POINT:
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WRITE(p, " lightScale = clamp(1.0 / dot(light.att[%i], vec3(1.0, distance, distance*distance)), 0.0, 1.0);\n", i);
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break;
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case GE_LIGHTTYPE_SPOT:
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case GE_LIGHTTYPE_UNKNOWN:
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WRITE(p, " float angle%i = dot(normalize(light.dir[%i]), toLight);\n", i, i);
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WRITE(p, " if (angle%i >= light.angle[%i]) {\n", i, i);
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WRITE(p, " lightScale = clamp(1.0 / dot(light.att[%i], vec3(1.0, distance, distance*distance)), 0.0, 1.0) * pow(angle%i, light.spotCoef[%i]);\n", i, i, i);
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WRITE(p, " } else {\n");
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WRITE(p, " lightScale = 0.0;\n");
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WRITE(p, " }\n");
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break;
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default:
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// ILLEGAL
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break;
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}
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WRITE(p, " diffuse = (light.diffuse[%i] * %s) * dot%i;\n", i, diffuseStr, i);
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if (doSpecular) {
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WRITE(p, " dot%i = dot(normalize(toLight + vec3(0.0, 0.0, 1.0)), worldnormal);\n", i);
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WRITE(p, " if (dot%i > 0.0)\n", i);
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WRITE(p, " lightSum1 += light.specular[%i] * %s * (pow(dot%i, light.matspecular.a) %s);\n", i, specularStr, i, timesLightScale);
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}
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WRITE(p, " lightSum0.rgb += (light.ambient[%i] * %s.rgb + diffuse)%s;\n", i, ambientStr, timesLightScale);
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}
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|
|
if (enableLighting) {
|
|
// Sum up ambient, emissive here.
|
|
if (lmode) {
|
|
WRITE(p, " v_color0 = clamp(lightSum0, 0.0, 1.0);\n");
|
|
// v_color1 only exists when lmode = 1.
|
|
if (specularIsZero) {
|
|
WRITE(p, " v_color1 = vec3(0.0);\n");
|
|
} else {
|
|
WRITE(p, " v_color1 = clamp(lightSum1, 0.0, 1.0);\n");
|
|
}
|
|
} else {
|
|
if (specularIsZero) {
|
|
WRITE(p, " v_color0 = clamp(lightSum0, 0.0, 1.0);\n");
|
|
} else {
|
|
WRITE(p, " v_color0 = clamp(clamp(lightSum0, 0.0, 1.0) + vec4(lightSum1, 0.0), 0.0, 1.0);\n");
|
|
}
|
|
}
|
|
} else {
|
|
// Lighting doesn't affect color.
|
|
if (hasColor) {
|
|
WRITE(p, " v_color0 = color0;\n");
|
|
} else {
|
|
WRITE(p, " v_color0 = base.matambientalpha;\n");
|
|
}
|
|
if (lmode) {
|
|
WRITE(p, " v_color1 = vec3(0.0);\n");
|
|
}
|
|
}
|
|
|
|
bool scaleUV = !throughmode && (uvGenMode == GE_TEXMAP_TEXTURE_COORDS || uvGenMode == GE_TEXMAP_UNKNOWN);
|
|
|
|
// Step 3: UV generation
|
|
if (doTexture) {
|
|
switch (uvGenMode) {
|
|
case GE_TEXMAP_TEXTURE_COORDS: // Scale-offset. Easy.
|
|
case GE_TEXMAP_UNKNOWN: // Not sure what this is, but Riviera uses it. Treating as coords works.
|
|
if (scaleUV) {
|
|
if (hasTexcoord) {
|
|
WRITE(p, " v_texcoord = texcoord;\n");
|
|
} else {
|
|
WRITE(p, " v_texcoord = vec2(0.0);\n");
|
|
}
|
|
} else {
|
|
if (hasTexcoord) {
|
|
WRITE(p, " v_texcoord = texcoord * base.uvscaleoffset.xy + base.uvscaleoffset.zw;\n");
|
|
} else {
|
|
WRITE(p, " v_texcoord = base.uvscaleoffset.zw;\n");
|
|
}
|
|
}
|
|
break;
|
|
|
|
case GE_TEXMAP_TEXTURE_MATRIX: // Projection mapping.
|
|
{
|
|
std::string temp_tc;
|
|
switch (uvProjMode) {
|
|
case GE_PROJMAP_POSITION: // Use model space XYZ as source
|
|
temp_tc = "vec4(position.xyz, 1.0)";
|
|
break;
|
|
case GE_PROJMAP_UV: // Use unscaled UV as source
|
|
{
|
|
// scaleUV is false here.
|
|
if (hasTexcoord) {
|
|
temp_tc = "vec4(texcoord.xy, 0.0, 1.0)";
|
|
} else {
|
|
temp_tc = "vec4(0.0, 0.0, 0.0, 1.0)";
|
|
}
|
|
}
|
|
break;
|
|
case GE_PROJMAP_NORMALIZED_NORMAL: // Use normalized transformed normal as source
|
|
if (hasNormal)
|
|
temp_tc = flipNormal ? "vec4(normalize(-normal), 1.0)" : "vec4(normalize(normal), 1.0)";
|
|
else
|
|
temp_tc = "vec4(0.0, 0.0, 1.0, 1.0)";
|
|
break;
|
|
case GE_PROJMAP_NORMAL: // Use non-normalized transformed normal as source
|
|
if (hasNormal)
|
|
temp_tc = flipNormal ? "vec4(-normal, 1.0)" : "vec4(normal, 1.0)";
|
|
else
|
|
temp_tc = "vec4(0.0, 0.0, 1.0, 1.0)";
|
|
break;
|
|
}
|
|
// Transform by texture matrix. XYZ as we are doing projection mapping.
|
|
WRITE(p, " v_texcoord = (base.tex_mtx * %s).xyz * vec3(base.uvscaleoffset.xy, 1.0);\n", temp_tc.c_str());
|
|
}
|
|
break;
|
|
|
|
case GE_TEXMAP_ENVIRONMENT_MAP: // Shade mapping - use dots from light sources.
|
|
WRITE(p, " v_texcoord = base.uvscaleoffset.xy * vec2(1.0 + dot(normalize(light.pos[%i]), worldnormal), 1.0 + dot(normalize(light.pos[%i]), worldnormal)) * 0.5;\n", ls0, ls1);
|
|
break;
|
|
|
|
default:
|
|
// ILLEGAL
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Compute fogdepth
|
|
if (enableFog)
|
|
WRITE(p, " v_fogdepth = (viewPos.z + base.fogcoef_stencilreplace.x) * base.fogcoef_stencilreplace.y;\n");
|
|
}
|
|
WRITE(p, "}\n");
|
|
return true;
|
|
}
|