1 /***************************************************************************
2 * Copyright (C) 2010 PCSX4ALL Team *
3 * Copyright (C) 2010 Unai *
4 * Copyright (C) 2016 Senquack (dansilsby <AT> gmail <DOT> com) *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the *
18 * Free Software Foundation, Inc., *
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. *
20 ***************************************************************************/
21
22 #ifndef GPU_UNAI_H
23 #define GPU_UNAI_H
24
25 #include "gpu.h"
26
27 // Header shared between both standalone gpu_unai (gpu.cpp) and new
28 // gpulib-compatible gpu_unai (gpulib_if.cpp)
29 // -> Anything here should be for gpu_unai's private use. <-
30
31 ///////////////////////////////////////////////////////////////////////////////
32 // Compile Options
33
34 //#define ENABLE_GPU_NULL_SUPPORT // Enables NullGPU support
35 //#define ENABLE_GPU_LOG_SUPPORT // Enables gpu logger, very slow only for windows debugging
36 //#define ENABLE_GPU_ARMV7 // Enables ARMv7 optimized assembly
37
38 //Poly routine options (default is integer math and accurate division)
39 //#define GPU_UNAI_USE_FLOATMATH // Use float math in poly routines
40 //#define GPU_UNAI_USE_FLOAT_DIV_MULTINV // If GPU_UNAI_USE_FLOATMATH is defined,
41 // use multiply-by-inverse for division
42 //#define GPU_UNAI_USE_INT_DIV_MULTINV // If GPU_UNAI_USE_FLOATMATH is *not*
43 // defined, use old inaccurate division
44
45
46 #define GPU_INLINE static inline __attribute__((always_inline))
47 #define INLINE static inline __attribute__((always_inline))
48
49 #define u8 uint8_t
50 #define s8 int8_t
51 #define u16 uint16_t
52 #define s16 int16_t
53 #define u32 uint32_t
54 #define s32 int32_t
55 #define s64 int64_t
56
57 union PtrUnion
58 {
59 u32 *U4;
60 s32 *S4;
61 u16 *U2;
62 s16 *S2;
63 u8 *U1;
64 s8 *S1;
65 void *ptr;
66 };
67
68 union GPUPacket
69 {
70 u32 U4[16];
71 s32 S4[16];
72 u16 U2[32];
73 s16 S2[32];
74 u8 U1[64];
75 s8 S1[64];
76 };
77
SwapValues(T & x,T & y)78 template<class T> static inline void SwapValues(T &x, T &y)
79 {
80 T tmp(x); x = y; y = tmp;
81 }
82
83 template<typename T>
Min2(const T a,const T b)84 static inline T Min2 (const T a, const T b)
85 {
86 return (a<b)?a:b;
87 }
88
89 template<typename T>
Min3(const T a,const T b,const T c)90 static inline T Min3 (const T a, const T b, const T c)
91 {
92 return Min2(Min2(a,b),c);
93 }
94
95 template<typename T>
Max2(const T a,const T b)96 static inline T Max2 (const T a, const T b)
97 {
98 return (a>b)?a:b;
99 }
100
101 template<typename T>
Max3(const T a,const T b,const T c)102 static inline T Max3 (const T a, const T b, const T c)
103 {
104 return Max2(Max2(a,b),c);
105 }
106
107
108 ///////////////////////////////////////////////////////////////////////////////
109 // GPU Raster Macros
110
111 // Convert 24bpp color parameter of GPU command to 16bpp (15bpp + mask bit)
112 #define GPU_RGB16(rgb) ((((rgb)&0xF80000)>>9)|(((rgb)&0xF800)>>6)|(((rgb)&0xF8)>>3))
113
114 // Sign-extend 11-bit coordinate command param
115 #define GPU_EXPANDSIGN(x) (((s32)(x)<<(32-11))>>(32-11))
116
117 // Max difference between any two X or Y primitive coordinates
118 #define CHKMAX_X 1024
119 #define CHKMAX_Y 512
120
121 #define FRAME_BUFFER_SIZE (1024*512*2)
122 #define FRAME_WIDTH 1024
123 #define FRAME_HEIGHT 512
124 #define FRAME_OFFSET(x,y) (((y)<<10)+(x))
125 #define FRAME_BYTE_STRIDE 2048
126 #define FRAME_BYTES_PER_PIXEL 2
127
GPU_DIV(s32 rs,s32 rt)128 static inline s32 GPU_DIV(s32 rs, s32 rt)
129 {
130 return rt ? (rs / rt) : (0);
131 }
132
133 // 'Unsafe' version of above that doesn't check for div-by-zero
134 #define GPU_FAST_DIV(rs, rt) ((signed)(rs) / (signed)(rt))
135
136 struct gpu_unai_t {
137 u32 GPU_GP1;
138 GPUPacket PacketBuffer;
139 u16 *vram;
140
141 #ifdef USE_GPULIB
142 u16 *downscale_vram;
143 #endif
144 ////////////////////////////////////////////////////////////////////////////
145 // Variables used only by older standalone version of gpu_unai (gpu.cpp)
146 #ifndef USE_GPULIB
147 u32 GPU_GP0;
148 u32 tex_window; // Current texture window vals (set by GP0(E2h) cmd)
149 s32 PacketCount;
150 s32 PacketIndex;
151 bool fb_dirty; // Framebuffer is dirty (according to GPU)
152
153 // Display status
154 // NOTE: Standalone older gpu_unai didn't care about horiz display range
155 u16 DisplayArea[6]; // [0] : Start of display area (in VRAM) X
156 // [1] : Start of display area (in VRAM) Y
157 // [2] : Display mode resolution HORIZONTAL
158 // [3] : Display mode resolution VERTICAL
159 // [4] : Vertical display range (on TV) START
160 // [5] : Vertical display range (on TV) END
161
162 ////////////////////////////////////////////////////////////////////////////
163 // Dma Transfers info
164 struct {
165 s32 px,py;
166 s32 x_end,y_end;
167 u16* pvram;
168 u32 *last_dma; // Last dma pointer
169 bool FrameToRead; // Load image in progress
170 bool FrameToWrite; // Store image in progress
171 } dma;
172
173 ////////////////////////////////////////////////////////////////////////////
174 // Frameskip
175 struct {
176 int skipCount; // Frame skip (0,1,2,3...)
177 bool isSkip; // Skip frame (according to GPU)
178 bool skipFrame; // Skip this frame (according to frame skip)
179 bool wasSkip; // Skip frame old value (according to GPU)
180 bool skipGPU; // Skip GPU primitives
181 } frameskip;
182 #endif
183 // END of standalone gpu_unai variables
184 ////////////////////////////////////////////////////////////////////////////
185
186 u32 TextureWindowCur; // Current setting from last GP0(0xE2) cmd (raw form)
187 u8 TextureWindow[4]; // [0] : Texture window offset X
188 // [1] : Texture window offset Y
189 // [2] : Texture window mask X
190 // [3] : Texture window mask Y
191
192 u16 DrawingArea[4]; // [0] : Drawing area top left X
193 // [1] : Drawing area top left Y
194 // [2] : Drawing area bottom right X
195 // [3] : Drawing area bottom right Y
196
197 s16 DrawingOffset[2]; // [0] : Drawing offset X (signed)
198 // [1] : Drawing offset Y (signed)
199
200 u16* TBA; // Ptr to current texture in VRAM
201 u16* CBA; // Ptr to current CLUT in VRAM
202
203 ////////////////////////////////////////////////////////////////////////////
204 // Inner Loop parameters
205
206 // 22.10 Fixed-pt texture coords, mask, scanline advance
207 // NOTE: U,V are no longer packed together into one u32, this proved to be
208 // too imprecise, leading to pixel dropouts. Example: NFS3's skybox.
209 u32 u, v;
210 u32 u_msk, v_msk;
211 s32 u_inc, v_inc;
212
213 // Color for Gouraud-shaded prims
214 // Packed fixed-pt 8.3:8.3:8.2 rgb triplet
215 // layout: rrrrrrrrXXXggggggggXXXbbbbbbbbXX
216 // ^ bit 31 ^ bit 0
217 u32 gCol;
218 u32 gInc; // Increment along scanline for gCol
219
220 // Color for flat-shaded, texture-blended prims
221 u8 r5, g5, b5; // 5-bit light for undithered prims
222 u8 r8, g8, b8; // 8-bit light for dithered prims
223
224 // Color for flat-shaded, untextured prims
225 u16 PixelData; // bgr555 color for untextured flat-shaded polys
226
227 // End of inner Loop parameters
228 ////////////////////////////////////////////////////////////////////////////
229
230
231 u8 blit_mask; // Determines what pixels to skip when rendering.
232 // Only useful on low-resolution devices using
233 // a simple pixel-dropping downscaler for PS1
234 // high-res modes. See 'pixel_skip' option.
235
236 u8 ilace_mask; // Determines what lines to skip when rendering.
237 // Normally 0 when PS1 240 vertical res is in
238 // use and ilace_force is 0. When running in
239 // PS1 480 vertical res on a low-resolution
240 // device (320x240), will usually be set to 1
241 // so odd lines are not rendered. (Unless future
242 // full-screen scaling option is in use ..TODO)
243
244 bool prog_ilace_flag; // Tracks successive frames for 'prog_ilace' option
245
246 u8 BLEND_MODE;
247 u8 TEXT_MODE;
248 u8 Masking;
249
250 u16 PixelMSB;
251
252 gpu_unai_config_t config;
253
254 u8 LightLUT[32*32]; // 5-bit lighting LUT (gpu_inner_light.h)
255 u32 DitherMatrix[64]; // Matrix of dither coefficients
256 };
257
258 static gpu_unai_t gpu_unai;
259
260 // Global config that frontend can alter.. Values are read in GPU_init().
261 // TODO: if frontend menu modifies a setting, add a function that can notify
262 // GPU plugin to use new setting.
263 gpu_unai_config_t gpu_unai_config_ext;
264
265 ///////////////////////////////////////////////////////////////////////////////
266 // Internal inline funcs to get option status: (Allows flexibility)
LightingEnabled()267 static inline bool LightingEnabled()
268 {
269 return gpu_unai.config.lighting;
270 }
271
FastLightingEnabled()272 static inline bool FastLightingEnabled()
273 {
274 return gpu_unai.config.fast_lighting;
275 }
276
BlendingEnabled()277 static inline bool BlendingEnabled()
278 {
279 return gpu_unai.config.blending;
280 }
281
DitheringEnabled()282 static inline bool DitheringEnabled()
283 {
284 return gpu_unai.config.dithering;
285 }
286
287 // For now, this is just for development/experimentation purposes..
288 // If modified to return true, it will allow ignoring the status register
289 // bit 9 setting (dither enable). It will still restrict dithering only
290 // to Gouraud-shaded or texture-blended polys.
ForcedDitheringEnabled()291 static inline bool ForcedDitheringEnabled()
292 {
293 return false;
294 }
295
ProgressiveInterlaceEnabled()296 static inline bool ProgressiveInterlaceEnabled()
297 {
298 #ifdef USE_GPULIB
299 // Using this old option greatly decreases quality of image. Disabled
300 // for now when using new gpulib, since it also adds more work in loops.
301 return false;
302 #else
303 return gpu_unai.config.prog_ilace;
304 #endif
305 }
306
307 // For now, 320x240 output resolution is assumed, using simple line-skipping
308 // and pixel-skipping downscaler.
309 // TODO: Flesh these out so they return useful values based on whether
310 // running on higher-res device or a resampling downscaler is enabled.
PixelSkipEnabled()311 static inline bool PixelSkipEnabled()
312 {
313 return gpu_unai.config.pixel_skip || gpu_unai.config.scale_hires;
314 }
315
LineSkipEnabled()316 static inline bool LineSkipEnabled()
317 {
318 return true;
319 }
320
321 #endif // GPU_UNAI_H
322