mirror of
https://github.com/hrydgard/ppsspp.git
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314 lines
7.5 KiB
C++
314 lines
7.5 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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#pragma once
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#include "../GPUState.h"
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#include "../Globals.h"
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#include "base/basictypes.h"
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// DecVtxFormat - vertex formats for PC
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// Kind of like a D3D VertexDeclaration.
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// Can write code to easily bind these using OpenGL, or read these manually.
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// No morph support, that is taken care of by the VertexDecoder.
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enum {
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DEC_NONE,
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DEC_FLOAT_1,
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DEC_FLOAT_2,
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DEC_FLOAT_3,
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DEC_FLOAT_4,
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DEC_S8_3,
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DEC_S16_3,
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DEC_U8_4,
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};
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int DecFmtSize(u8 fmt);
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struct DecVtxFormat {
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u8 w0fmt; u8 w0off; // first 4 weights
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u8 w1fmt; u8 w1off; // second 4 weights
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u8 uvfmt; u8 uvoff;
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u8 c0fmt; u8 c0off; // First color
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u8 c1fmt; u8 c1off;
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u8 nrmfmt; u8 nrmoff;
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u8 posfmt; u8 posoff;
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short stride;
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};
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// This struct too.
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struct TransformedVertex
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{
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float x, y, z; // in case of morph, preblend during decode
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float u; float v; // scaled by uscale, vscale, if there
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float color0[4]; // prelit
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float color1[3]; // prelit
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};
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DecVtxFormat GetTransformedVtxFormat(const DecVtxFormat &fmt);
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class VertexDecoder;
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typedef void (VertexDecoder::*StepFunction)() const;
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// Right now
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// - only contains computed information
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// - does decoding in nasty branchfilled loops
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// Future TODO
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// - should be cached, not recreated every time
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// - will compile into list of called functions
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// - will compile into lighting fast specialized x86 and ARM
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// - will not bother translating components that can be read directly
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// by OpenGL ES. Will still have to translate 565 colors and things
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// like that. DecodedVertex will not be a fixed struct. Will have to
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// do morphing here.
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class VertexDecoder
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{
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public:
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VertexDecoder() : coloff(0), nrmoff(0), posoff(0) {}
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~VertexDecoder() {}
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void SetVertexType(u32 vtype);
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const DecVtxFormat &GetDecVtxFmt() { return decFmt; }
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void DecodeVerts(u8 *decoded, const void *verts, const void *inds, int prim, int count, int *indexLowerBound, int *indexUpperBound) const;
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bool hasColor() const { return col != 0; }
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int VertexSize() const { return size; }
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void Step_WeightsU8() const;
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void Step_WeightsU16() const;
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void Step_WeightsFloat() const;
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void Step_TcU8() const;
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void Step_TcU16() const;
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void Step_TcFloat() const;
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void Step_TcU16Through() const;
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void Step_TcFloatThrough() const;
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// TODO: tcmorph
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void Step_Color4444() const;
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void Step_Color565() const;
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void Step_Color5551() const;
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void Step_Color8888() const;
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void Step_Color4444Morph() const;
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void Step_Color565Morph() const;
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void Step_Color5551Morph() const;
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void Step_Color8888Morph() const;
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void Step_NormalS8() const;
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void Step_NormalS16() const;
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void Step_NormalFloat() const;
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void Step_NormalS8Morph() const;
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void Step_NormalS16Morph() const;
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void Step_NormalFloatMorph() const;
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void Step_PosS8() const;
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void Step_PosS16() const;
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void Step_PosFloat() const;
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void Step_PosS8Morph() const;
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void Step_PosS16Morph() const;
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void Step_PosFloatMorph() const;
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void Step_PosS8Through() const;
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void Step_PosS16Through() const;
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void Step_PosFloatThrough() const;
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// Mutable decoder state
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mutable u8 *decoded_;
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mutable const u8 *ptr_;
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// "Immutable" state, set at startup
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// The decoding steps
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StepFunction steps_[5];
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int numSteps_;
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u32 fmt_;
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DecVtxFormat decFmt;
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bool throughmode;
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int biggest;
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int size;
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int onesize_;
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int weightoff;
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int tcoff;
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int coloff;
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int nrmoff;
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int posoff;
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int tc;
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int col;
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int nrm;
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int pos;
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int weighttype;
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int idx;
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int morphcount;
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int nweights;
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};
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// Reads decoded vertex formats in a convenient way. For software transform and debugging.
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class VertexReader
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{
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public:
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VertexReader(u8 *base, const DecVtxFormat &decFmt) : base_(base), data_(base), decFmt_(decFmt) {}
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void ReadPos(float pos[3]) {
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switch (decFmt_.posfmt) {
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case DEC_FLOAT_3:
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memcpy(pos, data_ + decFmt_.posoff, 12);
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break;
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case DEC_S16_3:
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{
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s16 *p = (s16 *)(data_ + decFmt_.posoff);
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for (int i = 0; i < 3; i++)
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pos[i] = p[i] / 32767.0f;
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}
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break;
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case DEC_S8_3:
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{
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s8 *p = (s8 *)(data_ + decFmt_.posoff);
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for (int i = 0; i < 3; i++)
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pos[i] = p[i] / 127.0f;
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}
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break;
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default:
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ERROR_LOG(G3D, "Reader: Unsupported Pos Format");
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break;
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}
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}
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void ReadNrm(float nrm[3]) {
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switch (decFmt_.nrmfmt) {
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case DEC_FLOAT_3:
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memcpy(nrm, data_ + decFmt_.nrmoff, 12);
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break;
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case DEC_S16_3:
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{
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s16 *p = (s16 *)(data_ + decFmt_.nrmoff);
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for (int i = 0; i < 3; i++)
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nrm[i] = p[i] / 32767.0f;
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}
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break;
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case DEC_S8_3:
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{
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s8 *p = (s8 *)(data_ + decFmt_.nrmoff);
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for (int i = 0; i < 3; i++)
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nrm[i] = p[i] / 127.0f;
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}
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break;
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default:
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ERROR_LOG(G3D, "Reader: Unsupported Nrm Format");
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break;
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}
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}
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void ReadUV(float uv[2]) {
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switch (decFmt_.uvfmt) {
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case DEC_FLOAT_2:
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memcpy(uv, data_ + decFmt_.uvoff, 8); break;
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default:
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ERROR_LOG(G3D, "Reader: Unsupported UV Format");
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break;
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}
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}
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void ReadColor0(float color[4]) {
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switch (decFmt_.c0fmt) {
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case DEC_U8_4:
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{
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u8 *p = (u8 *)(data_ + decFmt_.c0off);
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for (int i = 0; i < 4; i++)
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color[i] = p[i] / 255.0f;
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}
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break;
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case DEC_FLOAT_4:
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memcpy(color, data_ + decFmt_.c0off, 16); break;
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default:
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ERROR_LOG(G3D, "Reader: Unsupported C0 Format");
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break;
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}
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}
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void ReadColor1(float color[3]) {
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switch (decFmt_.c1fmt) {
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case DEC_U8_4:
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{
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u8 *p = (u8 *)(data_ + decFmt_.c1off);
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for (int i = 0; i < 3; i++)
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color[i] = p[i] / 255.0f;
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}
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break;
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case DEC_FLOAT_4:
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memcpy(color, data_ + decFmt_.c1off, 12); break;
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default:
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ERROR_LOG(G3D, "Reader: Unsupported C1 Format");
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break;
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}
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}
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void ReadWeights(float weights[8]) {
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switch (decFmt_.w0fmt) {
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case DEC_FLOAT_1: memcpy(weights, data_ + decFmt_.w0off, 4); break;
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case DEC_FLOAT_2: memcpy(weights, data_ + decFmt_.w0off, 8); break;
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case DEC_FLOAT_3: memcpy(weights, data_ + decFmt_.w0off, 12); break;
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case DEC_FLOAT_4: memcpy(weights, data_ + decFmt_.w0off, 16); break;
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default:
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ERROR_LOG(G3D, "Reader: Unsupported W0 Format");
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break;
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}
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switch (decFmt_.w1fmt) {
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case 0:
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// It's fine for there to be w0 weights but not w1.
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break;
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case DEC_FLOAT_1: memcpy(weights + 4, data_ + decFmt_.w1off, 4); break;
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case DEC_FLOAT_2: memcpy(weights + 4, data_ + decFmt_.w1off, 8); break;
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case DEC_FLOAT_3: memcpy(weights + 4, data_ + decFmt_.w1off, 12); break;
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case DEC_FLOAT_4: memcpy(weights + 4, data_ + decFmt_.w1off, 16); break;
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default:
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ERROR_LOG(G3D, "Reader: Unsupported W1 Format");
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break;
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}
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}
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bool hasColor0() const { return decFmt_.c0fmt != 0; }
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bool hasNormal() const { return decFmt_.nrmfmt != 0; }
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bool hasUV() const { return decFmt_.uvfmt != 0; }
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void Goto(int index) {
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data_ = base_ + index * decFmt_.stride;
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}
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private:
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u8 *base_;
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u8 *data_;
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DecVtxFormat decFmt_;
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int vtype_;
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};
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// Debugging utilities
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void PrintDecodedVertex(VertexReader &vtx);
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