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1a831cfc7d
As much as possible, the asserts have been moved out of the GetUID function. But there are some places where asserts depend on variables that aren't stored in the shader UID.
245 lines
9 KiB
C
245 lines
9 KiB
C
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include "Common/Assert.h"
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#include "Common/CommonTypes.h"
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#include "VideoCommon/NativeVertexFormat.h"
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#include "VideoCommon/ShaderGenCommon.h"
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#include "VideoCommon/XFMemory.h"
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#define LIGHT_COL "%s[%d].color.%s"
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#define LIGHT_COL_PARAMS(index, swizzle) (I_LIGHTS), (index), (swizzle)
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#define LIGHT_COSATT "%s[%d].cosatt"
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#define LIGHT_COSATT_PARAMS(index) (I_LIGHTS), (index)
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#define LIGHT_DISTATT "%s[%d].distatt"
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#define LIGHT_DISTATT_PARAMS(index) (I_LIGHTS), (index)
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#define LIGHT_POS "%s[%d].pos"
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#define LIGHT_POS_PARAMS(index) (I_LIGHTS), (index)
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#define LIGHT_DIR "%s[%d].dir"
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#define LIGHT_DIR_PARAMS(index) (I_LIGHTS), (index)
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/**
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* Common uid data used for shader generators that use lighting calculations.
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*/
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struct LightingUidData
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{
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u32 matsource : 4; // 4x1 bit
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u32 enablelighting : 4; // 4x1 bit
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u32 ambsource : 4; // 4x1 bit
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u32 diffusefunc : 8; // 4x2 bits
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u32 attnfunc : 8; // 4x2 bits
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u32 light_mask : 32; // 4x8 bits
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};
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static const char s_lighting_struct[] = "struct Light {\n"
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"\tint4 color;\n"
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"\tfloat4 cosatt;\n"
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"\tfloat4 distatt;\n"
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"\tfloat4 pos;\n"
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"\tfloat4 dir;\n"
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"};\n";
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static void GenerateLightShader(ShaderCode& object, const LightingUidData& uid_data, int index,
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int litchan_index, bool alpha)
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{
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const char* swizzle = alpha ? "a" : "rgb";
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const char* swizzle_components = (alpha) ? "" : "3";
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int attnfunc = (uid_data.attnfunc >> (2 * litchan_index)) & 0x3;
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int diffusefunc = (uid_data.diffusefunc >> (2 * litchan_index)) & 0x3;
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switch (attnfunc)
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{
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case LIGHTATTN_NONE:
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case LIGHTATTN_DIR:
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object.Write("ldir = normalize(" LIGHT_POS ".xyz - pos.xyz);\n", LIGHT_POS_PARAMS(index));
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object.Write("attn = 1.0;\n");
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object.Write("if (length(ldir) == 0.0)\n\t ldir = _norm0;\n");
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break;
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case LIGHTATTN_SPEC:
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object.Write("ldir = normalize(" LIGHT_POS ".xyz - pos.xyz);\n", LIGHT_POS_PARAMS(index));
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object.Write("attn = (dot(_norm0, ldir) >= 0.0) ? max(0.0, dot(_norm0, " LIGHT_DIR
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".xyz)) : 0.0;\n",
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LIGHT_DIR_PARAMS(index));
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object.Write("cosAttn = " LIGHT_COSATT ".xyz;\n", LIGHT_COSATT_PARAMS(index));
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object.Write("distAttn = %s(" LIGHT_DISTATT ".xyz);\n",
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(diffusefunc == LIGHTDIF_NONE) ? "" : "normalize", LIGHT_DISTATT_PARAMS(index));
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object.Write("attn = max(0.0f, dot(cosAttn, float3(1.0, attn, attn*attn))) / dot(distAttn, "
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"float3(1.0, attn, attn*attn));\n");
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break;
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case LIGHTATTN_SPOT:
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object.Write("ldir = " LIGHT_POS ".xyz - pos.xyz;\n", LIGHT_POS_PARAMS(index));
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object.Write("dist2 = dot(ldir, ldir);\n"
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"dist = sqrt(dist2);\n"
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"ldir = ldir / dist;\n"
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"attn = max(0.0, dot(ldir, " LIGHT_DIR ".xyz));\n",
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LIGHT_DIR_PARAMS(index));
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// attn*attn may overflow
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object.Write("attn = max(0.0, " LIGHT_COSATT ".x + " LIGHT_COSATT ".y*attn + " LIGHT_COSATT
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".z*attn*attn) / dot(" LIGHT_DISTATT ".xyz, float3(1.0,dist,dist2));\n",
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LIGHT_COSATT_PARAMS(index), LIGHT_COSATT_PARAMS(index), LIGHT_COSATT_PARAMS(index),
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LIGHT_DISTATT_PARAMS(index));
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break;
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}
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switch (diffusefunc)
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{
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case LIGHTDIF_NONE:
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object.Write("lacc.%s += int%s(round(attn * float%s(" LIGHT_COL ")));\n", swizzle,
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swizzle_components, swizzle_components, LIGHT_COL_PARAMS(index, swizzle));
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break;
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case LIGHTDIF_SIGN:
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case LIGHTDIF_CLAMP:
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object.Write("lacc.%s += int%s(round(attn * %sdot(ldir, _norm0)) * float%s(" LIGHT_COL ")));\n",
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swizzle, swizzle_components, diffusefunc != LIGHTDIF_SIGN ? "max(0.0," : "(",
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swizzle_components, LIGHT_COL_PARAMS(index, swizzle));
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break;
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default:
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_assert_(0);
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}
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object.Write("\n");
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}
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// vertex shader
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// lights/colors
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// materials name is I_MATERIALS in vs and I_PMATERIALS in ps
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// inColorName is color in vs and colors_ in ps
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// dest is o.colors_ in vs and colors_ in ps
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static void GenerateLightingShaderCode(ShaderCode& object, const LightingUidData& uid_data,
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int components, const char* inColorName, const char* dest)
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{
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for (unsigned int j = 0; j < xfmem.numChan.numColorChans; j++)
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{
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object.Write("{\n");
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bool colormatsource = !!(uid_data.matsource & (1 << j));
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if (colormatsource) // from vertex
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{
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if (components & (VB_HAS_COL0 << j))
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object.Write("int4 mat = int4(round(%s%d * 255.0));\n", inColorName, j);
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else if (components & VB_HAS_COL0)
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object.Write("int4 mat = int4(round(%s0 * 255.0));\n", inColorName);
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else
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object.Write("int4 mat = int4(255, 255, 255, 255);\n");
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}
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else // from color
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{
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object.Write("int4 mat = %s[%d];\n", I_MATERIALS, j + 2);
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}
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if (uid_data.enablelighting & (1 << j))
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{
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if (uid_data.ambsource & (1 << j)) // from vertex
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{
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if (components & (VB_HAS_COL0 << j))
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object.Write("lacc = int4(round(%s%d * 255.0));\n", inColorName, j);
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else if (components & VB_HAS_COL0)
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object.Write("lacc = int4(round(%s0 * 255.0));\n", inColorName);
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else
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// TODO: this isn't verified. Here we want to read the ambient from the vertex,
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// but the vertex itself has no color. So we don't know which value to read.
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// Returning 1.0 is the same as disabled lightning, so this could be fine
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object.Write("lacc = int4(255, 255, 255, 255);\n");
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}
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else // from color
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{
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object.Write("lacc = %s[%d];\n", I_MATERIALS, j);
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}
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}
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else
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{
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object.Write("lacc = int4(255, 255, 255, 255);\n");
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}
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// check if alpha is different
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bool alphamatsource = !!(uid_data.matsource & (1 << (j + 2)));
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if (alphamatsource != colormatsource)
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{
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if (alphamatsource) // from vertex
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{
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if (components & (VB_HAS_COL0 << j))
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object.Write("mat.w = int(round(%s%d.w * 255.0));\n", inColorName, j);
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else if (components & VB_HAS_COL0)
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object.Write("mat.w = int(round(%s0.w * 255.0));\n", inColorName);
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else
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object.Write("mat.w = 255;\n");
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}
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else // from color
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{
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object.Write("mat.w = %s[%d].w;\n", I_MATERIALS, j + 2);
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}
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}
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if (uid_data.enablelighting & (1 << (j + 2)))
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{
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if (uid_data.ambsource & (1 << (j + 2))) // from vertex
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{
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if (components & (VB_HAS_COL0 << j))
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object.Write("lacc.w = int(round(%s%d.w * 255.0));\n", inColorName, j);
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else if (components & VB_HAS_COL0)
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object.Write("lacc.w = int(round(%s0.w * 255.0));\n", inColorName);
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else
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// TODO: The same for alpha: We want to read from vertex, but the vertex has no color
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object.Write("lacc.w = 255;\n");
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}
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else // from color
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{
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object.Write("lacc.w = %s[%d].w;\n", I_MATERIALS, j);
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}
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}
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else
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{
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object.Write("lacc.w = 255;\n");
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}
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if (uid_data.enablelighting & (1 << j)) // Color lights
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{
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for (int i = 0; i < 8; ++i)
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if (uid_data.light_mask & (1 << (i + 8 * j)))
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GenerateLightShader(object, uid_data, i, j, false);
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}
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if (uid_data.enablelighting & (1 << (j + 2))) // Alpha lights
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{
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for (int i = 0; i < 8; ++i)
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if (uid_data.light_mask & (1 << (i + 8 * (j + 2))))
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GenerateLightShader(object, uid_data, i, j + 2, true);
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}
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object.Write("lacc = clamp(lacc, 0, 255);\n");
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object.Write("%s%d = float4((mat * (lacc + (lacc >> 7))) >> 8) / 255.0;\n", dest, j);
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object.Write("}\n");
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}
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}
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static void GetLightingShaderUid(LightingUidData& uid_data)
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{
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for (unsigned int j = 0; j < xfmem.numChan.numColorChans; j++)
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{
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uid_data.matsource |= xfmem.color[j].matsource << j;
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uid_data.matsource |= xfmem.alpha[j].matsource << (j + 2);
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uid_data.enablelighting |= xfmem.color[j].enablelighting << j;
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uid_data.enablelighting |= xfmem.alpha[j].enablelighting << (j + 2);
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if (uid_data.enablelighting & (1 << j)) // Color lights
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{
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uid_data.ambsource |= xfmem.color[j].ambsource << j;
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uid_data.attnfunc |= xfmem.color[j].attnfunc << (2 * j);
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uid_data.diffusefunc |= xfmem.color[j].diffusefunc << (2 * j);
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uid_data.light_mask |= xfmem.color[j].GetFullLightMask() << (8 * j);
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}
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if (uid_data.enablelighting & (1 << (j + 2))) // Alpha lights
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{
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uid_data.ambsource |= xfmem.alpha[j].ambsource << (j + 2);
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uid_data.attnfunc |= xfmem.alpha[j].attnfunc << (2 * (j + 2));
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uid_data.diffusefunc |= xfmem.alpha[j].diffusefunc << (2 * (j + 2));
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uid_data.light_mask |= xfmem.alpha[j].GetFullLightMask() << (8 * (j + 2));
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}
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}
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}
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