1 /***************************************************************************
2 * Copyright (C) 2010 PCSX4ALL Team *
3 * Copyright (C) 2010 Unai *
4 * Copyright (C) 2016 Senquack (dansilsby <AT> gmail <DOT> com) *
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. *
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. *
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 ***************************************************************************/
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. <-
31 ///////////////////////////////////////////////////////////////////////////////
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
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
46 #define GPU_INLINE static inline __attribute__((always_inline))
47 #define INLINE static inline __attribute__((always_inline))
65 static inline u32 le32_to_u32(le32_t le)
70 static inline s32 le32_to_s32(le32_t le)
72 return (int32_t) LE32TOH(le.v);
75 static inline u32 le32_raw(le32_t le)
80 static inline le32_t u32_to_le32(u32 u)
82 return (le32_t){ .v = HTOLE32(u) };
85 static inline u16 le16_to_u16(le16_t le)
90 static inline s16 le16_to_s16(le16_t le)
92 return (int16_t) LE16TOH(le.v);
95 static inline u16 le16_raw(le16_t le)
100 static inline le16_t u16_to_le16(u16 u)
102 return (le16_t){ .v = HTOLE16(u) };
120 template<class T> static inline void SwapValues(T &x, T &y)
122 T tmp(x); x = y; y = tmp;
126 static inline T Min2 (const T a, const T b)
132 static inline T Min3 (const T a, const T b, const T c)
134 return Min2(Min2(a,b),c);
138 static inline T Max2 (const T a, const T b)
144 static inline T Max3 (const T a, const T b, const T c)
146 return Max2(Max2(a,b),c);
150 ///////////////////////////////////////////////////////////////////////////////
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))
156 // Sign-extend 11-bit coordinate command param
157 #define GPU_EXPANDSIGN(x) (((s32)(x)<<(32-11))>>(32-11))
159 // Max difference between any two X or Y primitive coordinates
160 #define CHKMAX_X 1024
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
170 static inline s32 GPU_DIV(s32 rs, s32 rt)
172 return rt ? (rs / rt) : (0);
175 // 'Unsafe' version of above that doesn't check for div-by-zero
176 #define GPU_FAST_DIV(rs, rt) ((signed)(rs) / (signed)(rt))
180 GPUPacket PacketBuffer;
184 le16_t *downscale_vram;
186 ////////////////////////////////////////////////////////////////////////////
187 // Variables used only by older standalone version of gpu_unai (gpu.cpp)
190 u32 tex_window; // Current texture window vals (set by GP0(E2h) cmd)
193 bool fb_dirty; // Framebuffer is dirty (according to GPU)
196 // NOTE: Standalone older gpu_unai didn't care about horiz display range
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
204 ////////////////////////////////////////////////////////////////////////////
205 // Dma Transfers info
210 u32 *last_dma; // Last dma pointer
211 bool FrameToRead; // Load image in progress
212 bool FrameToWrite; // Store image in progress
215 ////////////////////////////////////////////////////////////////////////////
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
225 // END of standalone gpu_unai variables
226 ////////////////////////////////////////////////////////////////////////////
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
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
239 s16 DrawingOffset[2]; // [0] : Drawing offset X (signed)
240 // [1] : Drawing offset Y (signed)
242 le16_t* TBA; // Ptr to current texture in VRAM
243 le16_t* CBA; // Ptr to current CLUT in VRAM
245 ////////////////////////////////////////////////////////////////////////////
246 // Inner Loop parameters
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.
255 // Color for Gouraud-shaded prims
256 // Packed fixed-pt 8.3:8.3:8.2 rgb triplet
257 // layout: rrrrrrrrXXXggggggggXXXbbbbbbbbXX
260 u32 gInc; // Increment along scanline for gCol
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
266 // Color for flat-shaded, untextured prims
267 u16 PixelData; // bgr555 color for untextured flat-shaded polys
269 // End of inner Loop parameters
270 ////////////////////////////////////////////////////////////////////////////
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.
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)
286 bool prog_ilace_flag; // Tracks successive frames for 'prog_ilace' option
294 gpu_unai_config_t config;
296 u8 LightLUT[32*32]; // 5-bit lighting LUT (gpu_inner_light.h)
297 u32 DitherMatrix[64]; // Matrix of dither coefficients
300 static gpu_unai_t gpu_unai;
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.
305 gpu_unai_config_t gpu_unai_config_ext;
307 ///////////////////////////////////////////////////////////////////////////////
308 // Internal inline funcs to get option status: (Allows flexibility)
309 static inline bool LightingEnabled()
311 return gpu_unai.config.lighting;
314 static inline bool FastLightingEnabled()
316 return gpu_unai.config.fast_lighting;
319 static inline bool BlendingEnabled()
321 return gpu_unai.config.blending;
324 static inline bool DitheringEnabled()
326 return gpu_unai.config.dithering;
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()
338 static inline bool ProgressiveInterlaceEnabled()
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.
345 return gpu_unai.config.prog_ilace;
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()
355 return gpu_unai.config.pixel_skip || gpu_unai.config.scale_hires;
358 static inline bool LineSkipEnabled()