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Diffstat (limited to 'plugins/gpu_unai/gpu_unai.h')
| -rw-r--r-- | plugins/gpu_unai/gpu_unai.h | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/plugins/gpu_unai/gpu_unai.h b/plugins/gpu_unai/gpu_unai.h new file mode 100644 index 0000000..8fb2293 --- /dev/null +++ b/plugins/gpu_unai/gpu_unai.h @@ -0,0 +1,318 @@ +/*************************************************************************** +* Copyright (C) 2010 PCSX4ALL Team * +* Copyright (C) 2010 Unai * +* Copyright (C) 2016 Senquack (dansilsby <AT> gmail <DOT> com) * +* * +* This program is free software; you can redistribute it and/or modify * +* it under the terms of the GNU General Public License as published by * +* the Free Software Foundation; either version 2 of the License, or * +* (at your option) any later version. * +* * +* This program is distributed in the hope that it will be useful, * +* but WITHOUT ANY WARRANTY; without even the implied warranty of * +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * +* GNU General Public License for more details. * +* * +* You should have received a copy of the GNU General Public License * +* along with this program; if not, write to the * +* Free Software Foundation, Inc., * +* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. * +***************************************************************************/ + +#ifndef GPU_UNAI_H +#define GPU_UNAI_H + +#include "gpu.h" + +// Header shared between both standalone gpu_unai (gpu.cpp) and new +// gpulib-compatible gpu_unai (gpulib_if.cpp) +// -> Anything here should be for gpu_unai's private use. <- + +/////////////////////////////////////////////////////////////////////////////// +// Compile Options + +//#define ENABLE_GPU_NULL_SUPPORT // Enables NullGPU support +//#define ENABLE_GPU_LOG_SUPPORT // Enables gpu logger, very slow only for windows debugging +//#define ENABLE_GPU_ARMV7 // Enables ARMv7 optimized assembly + +//Poly routine options (default is integer math and accurate division) +//#define GPU_UNAI_USE_FLOATMATH // Use float math in poly routines +//#define GPU_UNAI_USE_FLOAT_DIV_MULTINV // If GPU_UNAI_USE_FLOATMATH is defined, + // use multiply-by-inverse for division +//#define GPU_UNAI_USE_INT_DIV_MULTINV // If GPU_UNAI_USE_FLOATMATH is *not* + // defined, use old inaccurate division + + +#define GPU_INLINE static inline __attribute__((always_inline)) +#define INLINE static inline __attribute__((always_inline)) + +#define u8 uint8_t +#define s8 int8_t +#define u16 uint16_t +#define s16 int16_t +#define u32 uint32_t +#define s32 int32_t +#define s64 int64_t + +union PtrUnion +{ + u32 *U4; + s32 *S4; + u16 *U2; + s16 *S2; + u8 *U1; + s8 *S1; + void *ptr; +}; + +union GPUPacket +{ + u32 U4[16]; + s32 S4[16]; + u16 U2[32]; + s16 S2[32]; + u8 U1[64]; + s8 S1[64]; +}; + +template<class T> static inline void SwapValues(T &x, T &y) +{ + T tmp(x); x = y; y = tmp; +} + +template<typename T> +static inline T Min2 (const T a, const T b) +{ + return (a<b)?a:b; +} + +template<typename T> +static inline T Min3 (const T a, const T b, const T c) +{ + return Min2(Min2(a,b),c); +} + +template<typename T> +static inline T Max2 (const T a, const T b) +{ + return (a>b)?a:b; +} + +template<typename T> +static inline T Max3 (const T a, const T b, const T c) +{ + return Max2(Max2(a,b),c); +} + + +/////////////////////////////////////////////////////////////////////////////// +// GPU Raster Macros + +// Convert 24bpp color parameter of GPU command to 16bpp (15bpp + mask bit) +#define GPU_RGB16(rgb) ((((rgb)&0xF80000)>>9)|(((rgb)&0xF800)>>6)|(((rgb)&0xF8)>>3)) + +// Sign-extend 11-bit coordinate command param +#define GPU_EXPANDSIGN(x) (((s32)(x)<<(32-11))>>(32-11)) + +// Max difference between any two X or Y primitive coordinates +#define CHKMAX_X 1024 +#define CHKMAX_Y 512 + +#define FRAME_BUFFER_SIZE (1024*512*2) +#define FRAME_WIDTH 1024 +#define FRAME_HEIGHT 512 +#define FRAME_OFFSET(x,y) (((y)<<10)+(x)) +#define FRAME_BYTE_STRIDE 2048 +#define FRAME_BYTES_PER_PIXEL 2 + +static inline s32 GPU_DIV(s32 rs, s32 rt) +{ + return rt ? (rs / rt) : (0); +} + +// 'Unsafe' version of above that doesn't check for div-by-zero +#define GPU_FAST_DIV(rs, rt) ((signed)(rs) / (signed)(rt)) + +struct gpu_unai_t { + u32 GPU_GP1; + GPUPacket PacketBuffer; + u16 *vram; + + //////////////////////////////////////////////////////////////////////////// + // Variables used only by older standalone version of gpu_unai (gpu.cpp) +#ifndef USE_GPULIB + u32 GPU_GP0; + u32 tex_window; // Current texture window vals (set by GP0(E2h) cmd) + s32 PacketCount; + s32 PacketIndex; + bool fb_dirty; // Framebuffer is dirty (according to GPU) + + // Display status + // NOTE: Standalone older gpu_unai didn't care about horiz display range + u16 DisplayArea[6]; // [0] : Start of display area (in VRAM) X + // [1] : Start of display area (in VRAM) Y + // [2] : Display mode resolution HORIZONTAL + // [3] : Display mode resolution VERTICAL + // [4] : Vertical display range (on TV) START + // [5] : Vertical display range (on TV) END + + //////////////////////////////////////////////////////////////////////////// + // Dma Transfers info + struct { + s32 px,py; + s32 x_end,y_end; + u16* pvram; + u32 *last_dma; // Last dma pointer + bool FrameToRead; // Load image in progress + bool FrameToWrite; // Store image in progress + } dma; + + //////////////////////////////////////////////////////////////////////////// + // Frameskip + struct { + int skipCount; // Frame skip (0,1,2,3...) + bool isSkip; // Skip frame (according to GPU) + bool skipFrame; // Skip this frame (according to frame skip) + bool wasSkip; // Skip frame old value (according to GPU) + bool skipGPU; // Skip GPU primitives + } frameskip; +#endif + // END of standalone gpu_unai variables + //////////////////////////////////////////////////////////////////////////// + + u32 TextureWindowCur; // Current setting from last GP0(0xE2) cmd (raw form) + u8 TextureWindow[4]; // [0] : Texture window offset X + // [1] : Texture window offset Y + // [2] : Texture window mask X + // [3] : Texture window mask Y + + u16 DrawingArea[4]; // [0] : Drawing area top left X + // [1] : Drawing area top left Y + // [2] : Drawing area bottom right X + // [3] : Drawing area bottom right Y + + s16 DrawingOffset[2]; // [0] : Drawing offset X (signed) + // [1] : Drawing offset Y (signed) + + u16* TBA; // Ptr to current texture in VRAM + u16* CBA; // Ptr to current CLUT in VRAM + + //////////////////////////////////////////////////////////////////////////// + // Inner Loop parameters + + // 22.10 Fixed-pt texture coords, mask, scanline advance + // NOTE: U,V are no longer packed together into one u32, this proved to be + // too imprecise, leading to pixel dropouts. Example: NFS3's skybox. + u32 u, v; + u32 u_msk, v_msk; + s32 u_inc, v_inc; + + // Color for Gouraud-shaded prims + // Packed fixed-pt 8.3:8.3:8.2 rgb triplet + // layout: rrrrrrrrXXXggggggggXXXbbbbbbbbXX + // ^ bit 31 ^ bit 0 + u32 gCol; + u32 gInc; // Increment along scanline for gCol + + // Color for flat-shaded, texture-blended prims + u8 r5, g5, b5; // 5-bit light for undithered prims + u8 r8, g8, b8; // 8-bit light for dithered prims + + // Color for flat-shaded, untextured prims + u16 PixelData; // bgr555 color for untextured flat-shaded polys + + // End of inner Loop parameters + //////////////////////////////////////////////////////////////////////////// + + + u8 blit_mask; // Determines what pixels to skip when rendering. + // Only useful on low-resolution devices using + // a simple pixel-dropping downscaler for PS1 + // high-res modes. See 'pixel_skip' option. + + u8 ilace_mask; // Determines what lines to skip when rendering. + // Normally 0 when PS1 240 vertical res is in + // use and ilace_force is 0. When running in + // PS1 480 vertical res on a low-resolution + // device (320x240), will usually be set to 1 + // so odd lines are not rendered. (Unless future + // full-screen scaling option is in use ..TODO) + + bool prog_ilace_flag; // Tracks successive frames for 'prog_ilace' option + + u8 BLEND_MODE; + u8 TEXT_MODE; + u8 Masking; + + u16 PixelMSB; + + gpu_unai_config_t config; + + u8 LightLUT[32*32]; // 5-bit lighting LUT (gpu_inner_light.h) + u32 DitherMatrix[64]; // Matrix of dither coefficients +}; + +static gpu_unai_t gpu_unai; + +// Global config that frontend can alter.. Values are read in GPU_init(). +// TODO: if frontend menu modifies a setting, add a function that can notify +// GPU plugin to use new setting. +gpu_unai_config_t gpu_unai_config_ext; + +/////////////////////////////////////////////////////////////////////////////// +// Internal inline funcs to get option status: (Allows flexibility) +static inline bool LightingEnabled() +{ + return gpu_unai.config.lighting; +} + +static inline bool FastLightingEnabled() +{ + return gpu_unai.config.fast_lighting; +} + +static inline bool BlendingEnabled() +{ + return gpu_unai.config.blending; +} + +static inline bool DitheringEnabled() +{ + return gpu_unai.config.dithering; +} + +// For now, this is just for development/experimentation purposes.. +// If modified to return true, it will allow ignoring the status register +// bit 9 setting (dither enable). It will still restrict dithering only +// to Gouraud-shaded or texture-blended polys. +static inline bool ForcedDitheringEnabled() +{ + return false; +} + +static inline bool ProgressiveInterlaceEnabled() +{ +#ifdef USE_GPULIB + // Using this old option greatly decreases quality of image. Disabled + // for now when using new gpulib, since it also adds more work in loops. + return false; +#else + return gpu_unai.config.prog_ilace; +#endif +} + +// For now, 320x240 output resolution is assumed, using simple line-skipping +// and pixel-skipping downscaler. +// TODO: Flesh these out so they return useful values based on whether +// running on higher-res device or a resampling downscaler is enabled. +static inline bool PixelSkipEnabled() +{ + return gpu_unai.config.pixel_skip; +} + +static inline bool LineSkipEnabled() +{ + return true; +} + +#endif // GPU_UNAI_H |