[pcsx_rearmed.git] / plugins / gpu_unai / gpu_unai.h

/***************************************************************************
*   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

typedef struct {
        u32 v;
} le32_t;

typedef struct {
        u16 v;
} le16_t;

static inline u32 le32_to_u32(le32_t le)
{
        return LE32TOH(le.v);
}

static inline s32 le32_to_s32(le32_t le)
{
        return (int32_t) LE32TOH(le.v);
}

static inline u32 le32_raw(le32_t le)
{
	return le.v;
}

static inline le32_t u32_to_le32(u32 u)
{
	return (le32_t){ .v = HTOLE32(u) };
}

static inline u16 le16_to_u16(le16_t le)
{
        return LE16TOH(le.v);
}

static inline s16 le16_to_s16(le16_t le)
{
        return (int16_t) LE16TOH(le.v);
}

static inline u16 le16_raw(le16_t le)
{
	return le.v;
}

static inline le16_t u16_to_le16(u16 u)
{
	return (le16_t){ .v = HTOLE16(u) };
}

union PtrUnion
{
	le32_t  *U4;
	le16_t  *U2;
	u8   *U1;
	void *ptr;
};

union GPUPacket
{
	le32_t U4[16];
	le16_t U2[32];
	u8  U1[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;
	le16_t *vram;

#ifdef USE_GPULIB
	le16_t *downscale_vram;
#endif
	////////////////////////////////////////////////////////////////////////////
	// 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;
		le16_t* 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)

	le16_t* TBA;              // Ptr to current texture in VRAM
	le16_t* 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 || gpu_unai.config.scale_hires;
}

static inline bool LineSkipEnabled()
{
	return true;
}

#endif // GPU_UNAI_H
Commit	Line	Data
0bfe8d59	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
e223fa15	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. <-
0bfe8d59	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
e223fa15	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
0bfe8d59	105	union PtrUnion
0bfe8d59	106	{
e223fa15	107	le32_t *U4;
e223fa15	108	le16_t *U2;
0bfe8d59	109	u8 *U1;
0bfe8d59	110	void *ptr;
	111	};
	112
	113	union GPUPacket
	114	{
e223fa15	115	le32_t U4[16];
e223fa15	116	le16_t U2[32];
0bfe8d59	117	u8 U1[64];
0bfe8d59	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 (10245122)
	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
e223fa15	178	struct gpu_unai_t {
0bfe8d59	179	u32 GPU_GP1;
0bfe8d59	180	GPUPacket PacketBuffer;
e223fa15	181	le16_t *vram;
0bfe8d59	182
e223fa15	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)
0bfe8d59	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
e223fa15	196	// NOTE: Standalone older gpu_unai didn't care about horiz display range
0bfe8d59	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;
e223fa15	209	le16_t* pvram;
0bfe8d59	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
e223fa15	225	// END of standalone gpu_unai variables
0bfe8d59	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
e223fa15	242	le16_t* TBA; // Ptr to current texture in VRAM
e223fa15	243	le16_t* CBA; // Ptr to current CLUT in VRAM
0bfe8d59	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
e223fa15	294	gpu_unai_config_t config;
0bfe8d59	295
	296	u8 LightLUT[32*32]; // 5-bit lighting LUT (gpu_inner_light.h)
	297	u32 DitherMatrix[64]; // Matrix of dither coefficients
	298	};
	299
e223fa15	300	static gpu_unai_t gpu_unai;
0bfe8d59	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.
e223fa15	305	gpu_unai_config_t gpu_unai_config_ext;
0bfe8d59	306
	307	///////////////////////////////////////////////////////////////////////////////
	308	// Internal inline funcs to get option status: (Allows flexibility)
	309	static inline bool LightingEnabled()
	310	{
e223fa15	311	return gpu_unai.config.lighting;
0bfe8d59	312	}
	313
	314	static inline bool FastLightingEnabled()
	315	{
e223fa15	316	return gpu_unai.config.fast_lighting;
0bfe8d59	317	}
	318
	319	static inline bool BlendingEnabled()
	320	{
e223fa15	321	return gpu_unai.config.blending;
0bfe8d59	322	}
	323
	324	static inline bool DitheringEnabled()
	325	{
e223fa15	326	return gpu_unai.config.dithering;
0bfe8d59	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
e223fa15	345	return gpu_unai.config.prog_ilace;
0bfe8d59	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	{
e223fa15	355	return gpu_unai.config.pixel_skip \|\| gpu_unai.config.scale_hires;
0bfe8d59	356	}
	357
	358	static inline bool LineSkipEnabled()
	359	{
	360	return true;
	361	}
	362
	363	#endif // GPU_UNAI_H