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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 | |
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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. <- |
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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 | |
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57 | typedef struct { |
58 | u32 v; |
59 | } le32_t; |
60 | |
61 | typedef struct { |
62 | u16 v; |
63 | } le16_t; |
64 | |
65 | static inline u32 le32_to_u32(le32_t le) |
66 | { |
67 | return LE32TOH(le.v); |
68 | } |
69 | |
70 | static inline s32 le32_to_s32(le32_t le) |
71 | { |
72 | return (int32_t) LE32TOH(le.v); |
73 | } |
74 | |
75 | static inline u32 le32_raw(le32_t le) |
76 | { |
77 | return le.v; |
78 | } |
79 | |
80 | static inline le32_t u32_to_le32(u32 u) |
81 | { |
82 | return (le32_t){ .v = HTOLE32(u) }; |
83 | } |
84 | |
85 | static inline u16 le16_to_u16(le16_t le) |
86 | { |
87 | return LE16TOH(le.v); |
88 | } |
89 | |
90 | static inline s16 le16_to_s16(le16_t le) |
91 | { |
92 | return (int16_t) LE16TOH(le.v); |
93 | } |
94 | |
95 | static inline u16 le16_raw(le16_t le) |
96 | { |
97 | return le.v; |
98 | } |
99 | |
100 | static inline le16_t u16_to_le16(u16 u) |
101 | { |
102 | return (le16_t){ .v = HTOLE16(u) }; |
103 | } |
104 | |
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105 | union PtrUnion |
106 | { |
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107 | le32_t *U4; |
108 | le16_t *U2; |
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109 | u8 *U1; |
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110 | void *ptr; |
111 | }; |
112 | |
113 | union GPUPacket |
114 | { |
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115 | le32_t U4[16]; |
116 | le16_t U2[32]; |
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117 | u8 U1[64]; |
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118 | }; |
119 | |
120 | template<class T> static inline void SwapValues(T &x, T &y) |
121 | { |
122 | T tmp(x); x = y; y = tmp; |
123 | } |
124 | |
125 | template<typename T> |
126 | static inline T Min2 (const T a, const T b) |
127 | { |
128 | return (a<b)?a:b; |
129 | } |
130 | |
131 | template<typename T> |
132 | static inline T Min3 (const T a, const T b, const T c) |
133 | { |
134 | return Min2(Min2(a,b),c); |
135 | } |
136 | |
137 | template<typename T> |
138 | static inline T Max2 (const T a, const T b) |
139 | { |
140 | return (a>b)?a:b; |
141 | } |
142 | |
143 | template<typename T> |
144 | static inline T Max3 (const T a, const T b, const T c) |
145 | { |
146 | return Max2(Max2(a,b),c); |
147 | } |
148 | |
149 | |
150 | /////////////////////////////////////////////////////////////////////////////// |
151 | // GPU Raster Macros |
152 | |
153 | // Convert 24bpp color parameter of GPU command to 16bpp (15bpp + mask bit) |
154 | #define GPU_RGB16(rgb) ((((rgb)&0xF80000)>>9)|(((rgb)&0xF800)>>6)|(((rgb)&0xF8)>>3)) |
155 | |
156 | // Sign-extend 11-bit coordinate command param |
157 | #define GPU_EXPANDSIGN(x) (((s32)(x)<<(32-11))>>(32-11)) |
158 | |
159 | // Max difference between any two X or Y primitive coordinates |
160 | #define CHKMAX_X 1024 |
161 | #define CHKMAX_Y 512 |
162 | |
163 | #define FRAME_BUFFER_SIZE (1024*512*2) |
164 | #define FRAME_WIDTH 1024 |
165 | #define FRAME_HEIGHT 512 |
166 | #define FRAME_OFFSET(x,y) (((y)<<10)+(x)) |
167 | #define FRAME_BYTE_STRIDE 2048 |
168 | #define FRAME_BYTES_PER_PIXEL 2 |
169 | |
170 | static inline s32 GPU_DIV(s32 rs, s32 rt) |
171 | { |
172 | return rt ? (rs / rt) : (0); |
173 | } |
174 | |
175 | // 'Unsafe' version of above that doesn't check for div-by-zero |
176 | #define GPU_FAST_DIV(rs, rt) ((signed)(rs) / (signed)(rt)) |
177 | |
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178 | struct gpu_unai_t { |
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179 | u32 GPU_GP1; |
180 | GPUPacket PacketBuffer; |
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181 | le16_t *vram; |
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182 | |
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183 | #ifdef USE_GPULIB |
184 | le16_t *downscale_vram; |
185 | #endif |
186 | //////////////////////////////////////////////////////////////////////////// |
187 | // Variables used only by older standalone version of gpu_unai (gpu.cpp) |
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188 | #ifndef USE_GPULIB |
189 | u32 GPU_GP0; |
190 | u32 tex_window; // Current texture window vals (set by GP0(E2h) cmd) |
191 | s32 PacketCount; |
192 | s32 PacketIndex; |
193 | bool fb_dirty; // Framebuffer is dirty (according to GPU) |
194 | |
195 | // Display status |
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196 | // NOTE: Standalone older gpu_unai didn't care about horiz display range |
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197 | u16 DisplayArea[6]; // [0] : Start of display area (in VRAM) X |
198 | // [1] : Start of display area (in VRAM) Y |
199 | // [2] : Display mode resolution HORIZONTAL |
200 | // [3] : Display mode resolution VERTICAL |
201 | // [4] : Vertical display range (on TV) START |
202 | // [5] : Vertical display range (on TV) END |
203 | |
204 | //////////////////////////////////////////////////////////////////////////// |
205 | // Dma Transfers info |
206 | struct { |
207 | s32 px,py; |
208 | s32 x_end,y_end; |
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209 | le16_t* pvram; |
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210 | u32 *last_dma; // Last dma pointer |
211 | bool FrameToRead; // Load image in progress |
212 | bool FrameToWrite; // Store image in progress |
213 | } dma; |
214 | |
215 | //////////////////////////////////////////////////////////////////////////// |
216 | // Frameskip |
217 | struct { |
218 | int skipCount; // Frame skip (0,1,2,3...) |
219 | bool isSkip; // Skip frame (according to GPU) |
220 | bool skipFrame; // Skip this frame (according to frame skip) |
221 | bool wasSkip; // Skip frame old value (according to GPU) |
222 | bool skipGPU; // Skip GPU primitives |
223 | } frameskip; |
224 | #endif |
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225 | // END of standalone gpu_unai variables |
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226 | //////////////////////////////////////////////////////////////////////////// |
227 | |
228 | u32 TextureWindowCur; // Current setting from last GP0(0xE2) cmd (raw form) |
229 | u8 TextureWindow[4]; // [0] : Texture window offset X |
230 | // [1] : Texture window offset Y |
231 | // [2] : Texture window mask X |
232 | // [3] : Texture window mask Y |
233 | |
234 | u16 DrawingArea[4]; // [0] : Drawing area top left X |
235 | // [1] : Drawing area top left Y |
236 | // [2] : Drawing area bottom right X |
237 | // [3] : Drawing area bottom right Y |
238 | |
239 | s16 DrawingOffset[2]; // [0] : Drawing offset X (signed) |
240 | // [1] : Drawing offset Y (signed) |
241 | |
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242 | le16_t* TBA; // Ptr to current texture in VRAM |
243 | le16_t* CBA; // Ptr to current CLUT in VRAM |
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244 | |
245 | //////////////////////////////////////////////////////////////////////////// |
246 | // Inner Loop parameters |
247 | |
248 | // 22.10 Fixed-pt texture coords, mask, scanline advance |
249 | // NOTE: U,V are no longer packed together into one u32, this proved to be |
250 | // too imprecise, leading to pixel dropouts. Example: NFS3's skybox. |
251 | u32 u, v; |
252 | u32 u_msk, v_msk; |
253 | s32 u_inc, v_inc; |
254 | |
255 | // Color for Gouraud-shaded prims |
256 | // Packed fixed-pt 8.3:8.3:8.2 rgb triplet |
257 | // layout: rrrrrrrrXXXggggggggXXXbbbbbbbbXX |
258 | // ^ bit 31 ^ bit 0 |
259 | u32 gCol; |
260 | u32 gInc; // Increment along scanline for gCol |
261 | |
262 | // Color for flat-shaded, texture-blended prims |
263 | u8 r5, g5, b5; // 5-bit light for undithered prims |
264 | u8 r8, g8, b8; // 8-bit light for dithered prims |
265 | |
266 | // Color for flat-shaded, untextured prims |
267 | u16 PixelData; // bgr555 color for untextured flat-shaded polys |
268 | |
269 | // End of inner Loop parameters |
270 | //////////////////////////////////////////////////////////////////////////// |
271 | |
272 | |
273 | u8 blit_mask; // Determines what pixels to skip when rendering. |
274 | // Only useful on low-resolution devices using |
275 | // a simple pixel-dropping downscaler for PS1 |
276 | // high-res modes. See 'pixel_skip' option. |
277 | |
278 | u8 ilace_mask; // Determines what lines to skip when rendering. |
279 | // Normally 0 when PS1 240 vertical res is in |
280 | // use and ilace_force is 0. When running in |
281 | // PS1 480 vertical res on a low-resolution |
282 | // device (320x240), will usually be set to 1 |
283 | // so odd lines are not rendered. (Unless future |
284 | // full-screen scaling option is in use ..TODO) |
285 | |
286 | bool prog_ilace_flag; // Tracks successive frames for 'prog_ilace' option |
287 | |
288 | u8 BLEND_MODE; |
289 | u8 TEXT_MODE; |
290 | u8 Masking; |
291 | |
292 | u16 PixelMSB; |
293 | |
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294 | gpu_unai_config_t config; |
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295 | |
296 | u8 LightLUT[32*32]; // 5-bit lighting LUT (gpu_inner_light.h) |
297 | u32 DitherMatrix[64]; // Matrix of dither coefficients |
298 | }; |
299 | |
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300 | static gpu_unai_t gpu_unai; |
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301 | |
302 | // Global config that frontend can alter.. Values are read in GPU_init(). |
303 | // TODO: if frontend menu modifies a setting, add a function that can notify |
304 | // GPU plugin to use new setting. |
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305 | gpu_unai_config_t gpu_unai_config_ext; |
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306 | |
307 | /////////////////////////////////////////////////////////////////////////////// |
308 | // Internal inline funcs to get option status: (Allows flexibility) |
309 | static inline bool LightingEnabled() |
310 | { |
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311 | return gpu_unai.config.lighting; |
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312 | } |
313 | |
314 | static inline bool FastLightingEnabled() |
315 | { |
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316 | return gpu_unai.config.fast_lighting; |
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317 | } |
318 | |
319 | static inline bool BlendingEnabled() |
320 | { |
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321 | return gpu_unai.config.blending; |
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322 | } |
323 | |
324 | static inline bool DitheringEnabled() |
325 | { |
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326 | return gpu_unai.config.dithering; |
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327 | } |
328 | |
329 | // For now, this is just for development/experimentation purposes.. |
330 | // If modified to return true, it will allow ignoring the status register |
331 | // bit 9 setting (dither enable). It will still restrict dithering only |
332 | // to Gouraud-shaded or texture-blended polys. |
333 | static inline bool ForcedDitheringEnabled() |
334 | { |
335 | return false; |
336 | } |
337 | |
338 | static inline bool ProgressiveInterlaceEnabled() |
339 | { |
340 | #ifdef USE_GPULIB |
341 | // Using this old option greatly decreases quality of image. Disabled |
342 | // for now when using new gpulib, since it also adds more work in loops. |
343 | return false; |
344 | #else |
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345 | return gpu_unai.config.prog_ilace; |
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346 | #endif |
347 | } |
348 | |
349 | // For now, 320x240 output resolution is assumed, using simple line-skipping |
350 | // and pixel-skipping downscaler. |
351 | // TODO: Flesh these out so they return useful values based on whether |
352 | // running on higher-res device or a resampling downscaler is enabled. |
353 | static inline bool PixelSkipEnabled() |
354 | { |
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355 | return gpu_unai.config.pixel_skip || gpu_unai.config.scale_hires; |
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356 | } |
357 | |
358 | static inline bool LineSkipEnabled() |
359 | { |
360 | return true; |
361 | } |
362 | |
363 | #endif // GPU_UNAI_H |