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dpsoftrast.c
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#include <stdio.h>
#include <string.h>
#define _USE_MATH_DEFINES
#include <math.h>
#include "quakedef.h"
#include "thread.h"
#include "dpsoftrast.h"
#ifdef _MSC_VER
#pragma warning(disable : 4324)
#endif
#ifndef __cplusplus
typedef qboolean bool;
#endif
#define ALIGN_SIZE 16
#define ATOMIC_SIZE 4
#ifdef SSE_POSSIBLE
#if defined(__APPLE__)
#include <libkern/OSAtomic.h>
#define ALIGN(var) var __attribute__((__aligned__(16)))
#define ALIGNSTRUCT __attribute__((__aligned__(16)))
#define ATOMIC(var) var __attribute__((__aligned__(4)))
#define MEMORY_BARRIER (_mm_sfence())
#define ATOMIC_COUNTER volatile int32_t
#define ATOMIC_INCREMENT(counter) (OSAtomicIncrement32Barrier(&(counter)))
#define ATOMIC_DECREMENT(counter) (OSAtomicDecrement32Barrier(&(counter)))
#define ATOMIC_ADD(counter, val) ((void)OSAtomicAdd32Barrier((val), &(counter)))
#elif defined(__GNUC__) && defined(WIN32)
#define ALIGN(var) var __attribute__((__aligned__(16)))
#define ALIGNSTRUCT __attribute__((__aligned__(16)))
#define ATOMIC(var) var __attribute__((__aligned__(4)))
#define MEMORY_BARRIER (_mm_sfence())
//(__sync_synchronize())
#define ATOMIC_COUNTER volatile LONG
// this LONG * cast serves to fix an issue with broken mingw
// packages on Ubuntu; these only declare the function to take
// a LONG *, causing a compile error here. This seems to be
// error- and warn-free on platforms that DO declare
// InterlockedIncrement correctly, like mingw on Windows.
#define ATOMIC_INCREMENT(counter) (InterlockedIncrement((LONG *) &(counter)))
#define ATOMIC_DECREMENT(counter) (InterlockedDecrement((LONG *) &(counter)))
#define ATOMIC_ADD(counter, val) ((void)InterlockedExchangeAdd((LONG *) &(counter), (val)))
#elif defined(__GNUC__)
#define ALIGN(var) var __attribute__((__aligned__(16)))
#define ALIGNSTRUCT __attribute__((__aligned__(16)))
#define ATOMIC(var) var __attribute__((__aligned__(4)))
#define MEMORY_BARRIER (_mm_sfence())
//(__sync_synchronize())
#define ATOMIC_COUNTER volatile int
#define ATOMIC_INCREMENT(counter) (__sync_add_and_fetch(&(counter), 1))
#define ATOMIC_DECREMENT(counter) (__sync_add_and_fetch(&(counter), -1))
#define ATOMIC_ADD(counter, val) ((void)__sync_fetch_and_add(&(counter), (val)))
#elif defined(_MSC_VER)
#define ALIGN(var) __declspec(align(16)) var
#define ATOMIC(var) __declspec(align(4)) var
#define MEMORY_BARRIER (_mm_sfence())
//(MemoryBarrier())
#define ATOMIC_COUNTER volatile LONG
#define ATOMIC_INCREMENT(counter) (InterlockedIncrement(&(counter)))
#define ATOMIC_DECREMENT(counter) (InterlockedDecrement(&(counter)))
#define ATOMIC_ADD(counter, val) ((void)InterlockedExchangeAdd(&(counter), (val)))
#endif
#endif
#ifndef ALIGN
#define ALIGN(var) var
#endif
#ifndef ALIGNSTRUCT
#define ALIGNSTRUCT
#endif
#ifndef ATOMIC
#define ATOMIC(var) var
#endif
#ifndef MEMORY_BARRIER
#define MEMORY_BARRIER ((void)0)
#endif
#ifndef ATOMIC_COUNTER
#define ATOMIC_COUNTER int
#endif
#ifndef ATOMIC_INCREMENT
#define ATOMIC_INCREMENT(counter) (++(counter))
#endif
#ifndef ATOMIC_DECREMENT
#define ATOMIC_DECREMENT(counter) (--(counter))
#endif
#ifndef ATOMIC_ADD
#define ATOMIC_ADD(counter, val) ((void)((counter) += (val)))
#endif
#ifdef SSE_POSSIBLE
#include <emmintrin.h>
#if defined(__GNUC__) && (__GNUC < 4 || __GNUC_MINOR__ < 6) && !defined(__clang__)
#define _mm_cvtss_f32(val) (__builtin_ia32_vec_ext_v4sf ((__v4sf)(val), 0))
#endif
#define MM_MALLOC(size) _mm_malloc(size, ALIGN_SIZE)
static void *MM_CALLOC(size_t nmemb, size_t size)
{
void *ptr = _mm_malloc(nmemb*size, ALIGN_SIZE);
if (ptr != NULL) memset(ptr, 0, nmemb*size);
return ptr;
}
#define MM_FREE _mm_free
#else
#define MM_MALLOC(size) malloc(size)
#define MM_CALLOC(nmemb, size) calloc(nmemb, size)
#define MM_FREE free
#endif
typedef enum DPSOFTRAST_ARRAY_e
{
DPSOFTRAST_ARRAY_POSITION,
DPSOFTRAST_ARRAY_COLOR,
DPSOFTRAST_ARRAY_TEXCOORD0,
DPSOFTRAST_ARRAY_TEXCOORD1,
DPSOFTRAST_ARRAY_TEXCOORD2,
DPSOFTRAST_ARRAY_TEXCOORD3,
DPSOFTRAST_ARRAY_TEXCOORD4,
DPSOFTRAST_ARRAY_TEXCOORD5,
DPSOFTRAST_ARRAY_TEXCOORD6,
DPSOFTRAST_ARRAY_TEXCOORD7,
DPSOFTRAST_ARRAY_TOTAL
}
DPSOFTRAST_ARRAY;
typedef struct DPSOFTRAST_Texture_s
{
int flags;
int width;
int height;
int depth;
int sides;
DPSOFTRAST_TEXTURE_FILTER filter;
int mipmaps;
int size;
ATOMIC_COUNTER binds;
unsigned char *bytes;
int mipmap[DPSOFTRAST_MAXMIPMAPS][5];
}
DPSOFTRAST_Texture;
#define COMMAND_SIZE ALIGN_SIZE
#define COMMAND_ALIGN(var) ALIGN(var)
typedef COMMAND_ALIGN(struct DPSOFTRAST_Command_s
{
unsigned char opcode;
unsigned short commandsize;
}
DPSOFTRAST_Command);
enum { DPSOFTRAST_OPCODE_Reset = 0 };
#define DEFCOMMAND(opcodeval, name, fields) \
enum { DPSOFTRAST_OPCODE_##name = opcodeval }; \
typedef COMMAND_ALIGN(struct DPSOFTRAST_Command_##name##_s \
{ \
unsigned char opcode; \
unsigned short commandsize; \
fields \
} DPSOFTRAST_Command_##name );
#define DPSOFTRAST_DRAW_MAXCOMMANDPOOL 2097152
#define DPSOFTRAST_DRAW_MAXCOMMANDSIZE 16384
typedef ALIGN(struct DPSOFTRAST_State_Command_Pool_s
{
int freecommand;
int usedcommands;
ALIGN(unsigned char commands[DPSOFTRAST_DRAW_MAXCOMMANDPOOL]);
}
DPSOFTRAST_State_Command_Pool);
typedef ALIGN(struct DPSOFTRAST_State_Triangle_s
{
unsigned char mip[DPSOFTRAST_MAXTEXTUREUNITS]; // texcoord to screen space density values (for picking mipmap of textures)
float w[3];
ALIGN(float attribs[DPSOFTRAST_ARRAY_TOTAL][3][4]);
}
DPSOFTRAST_State_Triangle);
#define DPSOFTRAST_CALCATTRIB(triangle, span, data, slope, arrayindex) { \
slope = _mm_load_ps((triangle)->attribs[arrayindex][0]); \
data = _mm_add_ps(_mm_load_ps((triangle)->attribs[arrayindex][2]), \
_mm_add_ps(_mm_mul_ps(_mm_set1_ps((span)->x), slope), \
_mm_mul_ps(_mm_set1_ps((span)->y), _mm_load_ps((triangle)->attribs[arrayindex][1])))); \
}
#define DPSOFTRAST_CALCATTRIB4F(triangle, span, data, slope, arrayindex) { \
slope[0] = (triangle)->attribs[arrayindex][0][0]; \
slope[1] = (triangle)->attribs[arrayindex][0][1]; \
slope[2] = (triangle)->attribs[arrayindex][0][2]; \
slope[3] = (triangle)->attribs[arrayindex][0][3]; \
data[0] = (triangle)->attribs[arrayindex][2][0] + (span->x)*slope[0] + (span->y)*(triangle)->attribs[arrayindex][1][0]; \
data[1] = (triangle)->attribs[arrayindex][2][1] + (span->x)*slope[1] + (span->y)*(triangle)->attribs[arrayindex][1][1]; \
data[2] = (triangle)->attribs[arrayindex][2][2] + (span->x)*slope[2] + (span->y)*(triangle)->attribs[arrayindex][1][2]; \
data[3] = (triangle)->attribs[arrayindex][2][3] + (span->x)*slope[3] + (span->y)*(triangle)->attribs[arrayindex][1][3]; \
}
#define DPSOFTRAST_DRAW_MAXSUBSPAN 16
typedef ALIGN(struct ALIGNSTRUCT DPSOFTRAST_State_Span_s
{
int triangle; // triangle this span was generated by
int x; // framebuffer x coord
int y; // framebuffer y coord
int startx; // usable range (according to pixelmask)
int endx; // usable range (according to pixelmask)
unsigned char *pixelmask; // true for pixels that passed depth test, false for others
int depthbase; // depthbuffer value at x (add depthslope*startx to get first pixel's depthbuffer value)
int depthslope; // depthbuffer value pixel delta
}
DPSOFTRAST_State_Span);
#define DPSOFTRAST_DRAW_MAXSPANS 1024
#define DPSOFTRAST_DRAW_MAXTRIANGLES 128
#define DPSOFTRAST_DRAW_MAXSPANLENGTH 256
#define DPSOFTRAST_VALIDATE_FB 1
#define DPSOFTRAST_VALIDATE_DEPTHFUNC 2
#define DPSOFTRAST_VALIDATE_BLENDFUNC 4
#define DPSOFTRAST_VALIDATE_DRAW (DPSOFTRAST_VALIDATE_FB | DPSOFTRAST_VALIDATE_DEPTHFUNC | DPSOFTRAST_VALIDATE_BLENDFUNC)
typedef enum DPSOFTRAST_BLENDMODE_e
{
DPSOFTRAST_BLENDMODE_OPAQUE,
DPSOFTRAST_BLENDMODE_ALPHA,
DPSOFTRAST_BLENDMODE_ADDALPHA,
DPSOFTRAST_BLENDMODE_ADD,
DPSOFTRAST_BLENDMODE_INVMOD,
DPSOFTRAST_BLENDMODE_MUL,
DPSOFTRAST_BLENDMODE_MUL2,
DPSOFTRAST_BLENDMODE_SUBALPHA,
DPSOFTRAST_BLENDMODE_PSEUDOALPHA,
DPSOFTRAST_BLENDMODE_INVADD,
DPSOFTRAST_BLENDMODE_TOTAL
}
DPSOFTRAST_BLENDMODE;
typedef ALIGN(struct DPSOFTRAST_State_Thread_s
{
void *thread;
int index;
int cullface;
int colormask[4];
int blendfunc[2];
int blendsubtract;
int depthmask;
int depthtest;
int depthfunc;
int scissortest;
int viewport[4];
int scissor[4];
float depthrange[2];
float polygonoffset[2];
float clipplane[4];
ALIGN(float fb_clipplane[4]);
int shader_mode;
int shader_permutation;
int shader_exactspecularmath;
DPSOFTRAST_Texture *texbound[DPSOFTRAST_MAXTEXTUREUNITS];
ALIGN(float uniform4f[DPSOFTRAST_UNIFORM_TOTAL*4]);
int uniform1i[DPSOFTRAST_UNIFORM_TOTAL];
// DPSOFTRAST_VALIDATE_ flags
int validate;
// derived values (DPSOFTRAST_VALIDATE_FB)
int fb_colormask;
int fb_scissor[4];
ALIGN(float fb_viewportcenter[4]);
ALIGN(float fb_viewportscale[4]);
// derived values (DPSOFTRAST_VALIDATE_DEPTHFUNC)
int fb_depthfunc;
// derived values (DPSOFTRAST_VALIDATE_BLENDFUNC)
int fb_blendmode;
// band boundaries
int miny1;
int maxy1;
int miny2;
int maxy2;
ATOMIC(volatile int commandoffset);
volatile bool waiting;
volatile bool starving;
void *waitcond;
void *drawcond;
void *drawmutex;
int numspans;
int numtriangles;
DPSOFTRAST_State_Span spans[DPSOFTRAST_DRAW_MAXSPANS];
DPSOFTRAST_State_Triangle triangles[DPSOFTRAST_DRAW_MAXTRIANGLES];
unsigned char pixelmaskarray[DPSOFTRAST_DRAW_MAXSPANLENGTH+4]; // LordHavoc: padded to allow some termination bytes
}
DPSOFTRAST_State_Thread);
typedef ALIGN(struct DPSOFTRAST_State_s
{
int fb_width;
int fb_height;
unsigned int *fb_depthpixels;
unsigned int *fb_colorpixels[4];
int viewport[4];
ALIGN(float fb_viewportcenter[4]);
ALIGN(float fb_viewportscale[4]);
float color[4];
ALIGN(float uniform4f[DPSOFTRAST_UNIFORM_TOTAL*4]);
int uniform1i[DPSOFTRAST_UNIFORM_TOTAL];
const float *pointer_vertex3f;
const float *pointer_color4f;
const unsigned char *pointer_color4ub;
const float *pointer_texcoordf[DPSOFTRAST_MAXTEXCOORDARRAYS];
int stride_vertex;
int stride_color;
int stride_texcoord[DPSOFTRAST_MAXTEXCOORDARRAYS];
int components_texcoord[DPSOFTRAST_MAXTEXCOORDARRAYS];
DPSOFTRAST_Texture *texbound[DPSOFTRAST_MAXTEXTUREUNITS];
int firstvertex;
int numvertices;
float *post_array4f[DPSOFTRAST_ARRAY_TOTAL];
float *screencoord4f;
int drawstarty;
int drawendy;
int drawclipped;
int shader_mode;
int shader_permutation;
int shader_exactspecularmath;
int texture_max;
int texture_end;
int texture_firstfree;
DPSOFTRAST_Texture *texture;
int bigendian;
// error reporting
const char *errorstring;
bool usethreads;
int interlace;
int numthreads;
DPSOFTRAST_State_Thread *threads;
ATOMIC(volatile int drawcommand);
DPSOFTRAST_State_Command_Pool commandpool;
}
DPSOFTRAST_State);
DPSOFTRAST_State dpsoftrast;
#define DPSOFTRAST_DEPTHSCALE (1024.0f*1048576.0f)
#define DPSOFTRAST_DEPTHOFFSET (128.0f)
#define DPSOFTRAST_BGRA8_FROM_RGBA32F(r,g,b,a) (((int)(r * 255.0f + 0.5f) << 16) | ((int)(g * 255.0f + 0.5f) << 8) | (int)(b * 255.0f + 0.5f) | ((int)(a * 255.0f + 0.5f) << 24))
#define DPSOFTRAST_DEPTH32_FROM_DEPTH32F(d) ((int)(DPSOFTRAST_DEPTHSCALE * (1-d)))
static void DPSOFTRAST_Draw_DepthTest(DPSOFTRAST_State_Thread *thread, DPSOFTRAST_State_Span *span);
static void DPSOFTRAST_Draw_DepthWrite(const DPSOFTRAST_State_Thread *thread, const DPSOFTRAST_State_Span *span);
static void DPSOFTRAST_RecalcViewport(const int *viewport, float *fb_viewportcenter, float *fb_viewportscale)
{
fb_viewportcenter[1] = viewport[0] + 0.5f * viewport[2] - 0.5f;
fb_viewportcenter[2] = dpsoftrast.fb_height - viewport[1] - 0.5f * viewport[3] - 0.5f;
fb_viewportcenter[3] = 0.5f;
fb_viewportcenter[0] = 0.0f;
fb_viewportscale[1] = 0.5f * viewport[2];
fb_viewportscale[2] = -0.5f * viewport[3];
fb_viewportscale[3] = 0.5f;
fb_viewportscale[0] = 1.0f;
}
static void DPSOFTRAST_RecalcThread(DPSOFTRAST_State_Thread *thread)
{
if (dpsoftrast.interlace)
{
thread->miny1 = (thread->index*dpsoftrast.fb_height)/(2*dpsoftrast.numthreads);
thread->maxy1 = ((thread->index+1)*dpsoftrast.fb_height)/(2*dpsoftrast.numthreads);
thread->miny2 = ((dpsoftrast.numthreads+thread->index)*dpsoftrast.fb_height)/(2*dpsoftrast.numthreads);
thread->maxy2 = ((dpsoftrast.numthreads+thread->index+1)*dpsoftrast.fb_height)/(2*dpsoftrast.numthreads);
}
else
{
thread->miny1 = thread->miny2 = (thread->index*dpsoftrast.fb_height)/dpsoftrast.numthreads;
thread->maxy1 = thread->maxy2 = ((thread->index+1)*dpsoftrast.fb_height)/dpsoftrast.numthreads;
}
}
static void DPSOFTRAST_RecalcClipPlane(DPSOFTRAST_State_Thread *thread)
{
thread->fb_clipplane[0] = thread->clipplane[0] / thread->fb_viewportscale[1];
thread->fb_clipplane[1] = thread->clipplane[1] / thread->fb_viewportscale[2];
thread->fb_clipplane[2] = thread->clipplane[2] / thread->fb_viewportscale[3];
thread->fb_clipplane[3] = thread->clipplane[3] / thread->fb_viewportscale[0];
thread->fb_clipplane[3] -= thread->fb_viewportcenter[1]*thread->fb_clipplane[0] + thread->fb_viewportcenter[2]*thread->fb_clipplane[1] + thread->fb_viewportcenter[3]*thread->fb_clipplane[2] + thread->fb_viewportcenter[0]*thread->fb_clipplane[3];
}
static void DPSOFTRAST_RecalcFB(DPSOFTRAST_State_Thread *thread)
{
// calculate framebuffer scissor, viewport, viewport clipped by scissor,
// and viewport projection values
int x1, x2;
int y1, y2;
x1 = thread->scissor[0];
x2 = thread->scissor[0] + thread->scissor[2];
y1 = dpsoftrast.fb_height - thread->scissor[1] - thread->scissor[3];
y2 = dpsoftrast.fb_height - thread->scissor[1];
if (!thread->scissortest) {x1 = 0;y1 = 0;x2 = dpsoftrast.fb_width;y2 = dpsoftrast.fb_height;}
if (x1 < 0) x1 = 0;
if (x2 > dpsoftrast.fb_width) x2 = dpsoftrast.fb_width;
if (y1 < 0) y1 = 0;
if (y2 > dpsoftrast.fb_height) y2 = dpsoftrast.fb_height;
thread->fb_scissor[0] = x1;
thread->fb_scissor[1] = y1;
thread->fb_scissor[2] = x2 - x1;
thread->fb_scissor[3] = y2 - y1;
DPSOFTRAST_RecalcViewport(thread->viewport, thread->fb_viewportcenter, thread->fb_viewportscale);
DPSOFTRAST_RecalcClipPlane(thread);
DPSOFTRAST_RecalcThread(thread);
}
static void DPSOFTRAST_RecalcDepthFunc(DPSOFTRAST_State_Thread *thread)
{
thread->fb_depthfunc = thread->depthtest ? thread->depthfunc : GL_ALWAYS;
}
static void DPSOFTRAST_RecalcBlendFunc(DPSOFTRAST_State_Thread *thread)
{
if (thread->blendsubtract)
{
switch ((thread->blendfunc[0]<<16)|thread->blendfunc[1])
{
#define BLENDFUNC(sfactor, dfactor, blendmode) \
case (sfactor<<16)|dfactor: thread->fb_blendmode = blendmode; break;
BLENDFUNC(GL_SRC_ALPHA, GL_ONE, DPSOFTRAST_BLENDMODE_SUBALPHA)
default: thread->fb_blendmode = DPSOFTRAST_BLENDMODE_OPAQUE; break;
}
}
else
{
switch ((thread->blendfunc[0]<<16)|thread->blendfunc[1])
{
BLENDFUNC(GL_ONE, GL_ZERO, DPSOFTRAST_BLENDMODE_OPAQUE)
BLENDFUNC(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, DPSOFTRAST_BLENDMODE_ALPHA)
BLENDFUNC(GL_SRC_ALPHA, GL_ONE, DPSOFTRAST_BLENDMODE_ADDALPHA)
BLENDFUNC(GL_ONE, GL_ONE, DPSOFTRAST_BLENDMODE_ADD)
BLENDFUNC(GL_ZERO, GL_ONE_MINUS_SRC_COLOR, DPSOFTRAST_BLENDMODE_INVMOD)
BLENDFUNC(GL_ZERO, GL_SRC_COLOR, DPSOFTRAST_BLENDMODE_MUL)
BLENDFUNC(GL_DST_COLOR, GL_ZERO, DPSOFTRAST_BLENDMODE_MUL)
BLENDFUNC(GL_DST_COLOR, GL_SRC_COLOR, DPSOFTRAST_BLENDMODE_MUL2)
BLENDFUNC(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, DPSOFTRAST_BLENDMODE_PSEUDOALPHA)
BLENDFUNC(GL_ONE_MINUS_DST_COLOR, GL_ONE, DPSOFTRAST_BLENDMODE_INVADD)
default: thread->fb_blendmode = DPSOFTRAST_BLENDMODE_OPAQUE; break;
}
}
}
#define DPSOFTRAST_ValidateQuick(thread, f) ((thread->validate & (f)) ? (DPSOFTRAST_Validate(thread, f), 0) : 0)
static void DPSOFTRAST_Validate(DPSOFTRAST_State_Thread *thread, int mask)
{
mask &= thread->validate;
if (!mask)
return;
if (mask & DPSOFTRAST_VALIDATE_FB)
{
thread->validate &= ~DPSOFTRAST_VALIDATE_FB;
DPSOFTRAST_RecalcFB(thread);
}
if (mask & DPSOFTRAST_VALIDATE_DEPTHFUNC)
{
thread->validate &= ~DPSOFTRAST_VALIDATE_DEPTHFUNC;
DPSOFTRAST_RecalcDepthFunc(thread);
}
if (mask & DPSOFTRAST_VALIDATE_BLENDFUNC)
{
thread->validate &= ~DPSOFTRAST_VALIDATE_BLENDFUNC;
DPSOFTRAST_RecalcBlendFunc(thread);
}
}
static DPSOFTRAST_Texture *DPSOFTRAST_Texture_GetByIndex(int index)
{
if (index >= 1 && index < dpsoftrast.texture_end && dpsoftrast.texture[index].bytes)
return &dpsoftrast.texture[index];
return NULL;
}
static void DPSOFTRAST_Texture_Grow(void)
{
DPSOFTRAST_Texture *oldtexture = dpsoftrast.texture;
DPSOFTRAST_State_Thread *thread;
int i;
int j;
DPSOFTRAST_Flush();
// expand texture array as needed
if (dpsoftrast.texture_max < 1024)
dpsoftrast.texture_max = 1024;
else
dpsoftrast.texture_max *= 2;
dpsoftrast.texture = (DPSOFTRAST_Texture *)realloc(dpsoftrast.texture, dpsoftrast.texture_max * sizeof(DPSOFTRAST_Texture));
for (i = 0; i < DPSOFTRAST_MAXTEXTUREUNITS; i++)
if (dpsoftrast.texbound[i])
dpsoftrast.texbound[i] = dpsoftrast.texture + (dpsoftrast.texbound[i] - oldtexture);
for (j = 0; j < dpsoftrast.numthreads; j++)
{
thread = &dpsoftrast.threads[j];
for (i = 0; i < DPSOFTRAST_MAXTEXTUREUNITS; i++)
if (thread->texbound[i])
thread->texbound[i] = dpsoftrast.texture + (thread->texbound[i] - oldtexture);
}
}
int DPSOFTRAST_Texture_New(int flags, int width, int height, int depth)
{
int w;
int h;
int d;
int size;
int s;
int texnum;
int mipmaps;
int sides = (flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP) ? 6 : 1;
int texformat = flags & DPSOFTRAST_TEXTURE_FORMAT_COMPAREMASK;
DPSOFTRAST_Texture *texture;
if (width*height*depth < 1)
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: width, height or depth is less than 1";
return 0;
}
if (width > DPSOFTRAST_TEXTURE_MAXSIZE || height > DPSOFTRAST_TEXTURE_MAXSIZE || depth > DPSOFTRAST_TEXTURE_MAXSIZE)
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: texture size is too large";
return 0;
}
switch(texformat)
{
case DPSOFTRAST_TEXTURE_FORMAT_BGRA8:
case DPSOFTRAST_TEXTURE_FORMAT_RGBA8:
case DPSOFTRAST_TEXTURE_FORMAT_ALPHA8:
break;
case DPSOFTRAST_TEXTURE_FORMAT_DEPTH:
if (flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP)
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FORMAT_DEPTH only permitted on 2D textures";
return 0;
}
if (depth != 1)
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FORMAT_DEPTH only permitted on 2D textures";
return 0;
}
if ((flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP) && (texformat == DPSOFTRAST_TEXTURE_FORMAT_DEPTH))
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FORMAT_DEPTH does not permit mipmaps";
return 0;
}
break;
}
if (depth != 1 && (flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP))
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_CUBEMAP can not be used on 3D textures";
return 0;
}
if (depth != 1 && (flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_MIPMAP can not be used on 3D textures";
return 0;
}
if (depth != 1 && (flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_MIPMAP can not be used on 3D textures";
return 0;
}
if ((flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP) && (flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_MIPMAP can not be used on cubemap textures";
return 0;
}
if ((width & (width-1)) || (height & (height-1)) || (depth & (depth-1)))
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: dimensions are not power of two";
return 0;
}
// find first empty slot in texture array
for (texnum = dpsoftrast.texture_firstfree;texnum < dpsoftrast.texture_end;texnum++)
if (!dpsoftrast.texture[texnum].bytes)
break;
dpsoftrast.texture_firstfree = texnum + 1;
if (dpsoftrast.texture_max <= texnum)
DPSOFTRAST_Texture_Grow();
if (dpsoftrast.texture_end <= texnum)
dpsoftrast.texture_end = texnum + 1;
texture = &dpsoftrast.texture[texnum];
memset(texture, 0, sizeof(*texture));
texture->flags = flags;
texture->width = width;
texture->height = height;
texture->depth = depth;
texture->sides = sides;
texture->binds = 0;
w = width;
h = height;
d = depth;
size = 0;
mipmaps = 0;
for (;;)
{
s = w * h * d * sides * 4;
texture->mipmap[mipmaps][0] = size;
texture->mipmap[mipmaps][1] = s;
texture->mipmap[mipmaps][2] = w;
texture->mipmap[mipmaps][3] = h;
texture->mipmap[mipmaps][4] = d;
size += s;
mipmaps++;
if (w * h * d == 1 || !(flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
break;
if (w > 1) w >>= 1;
if (h > 1) h >>= 1;
if (d > 1) d >>= 1;
}
texture->mipmaps = mipmaps;
texture->size = size;
// allocate the pixels now
texture->bytes = (unsigned char *)MM_CALLOC(1, size);
return texnum;
}
void DPSOFTRAST_Texture_Free(int index)
{
DPSOFTRAST_Texture *texture;
texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
if (texture->binds)
DPSOFTRAST_Flush();
if (texture->bytes)
MM_FREE(texture->bytes);
texture->bytes = NULL;
memset(texture, 0, sizeof(*texture));
// adjust the free range and used range
if (dpsoftrast.texture_firstfree > index)
dpsoftrast.texture_firstfree = index;
while (dpsoftrast.texture_end > 0 && dpsoftrast.texture[dpsoftrast.texture_end-1].bytes == NULL)
dpsoftrast.texture_end--;
}
static void DPSOFTRAST_Texture_CalculateMipmaps(int index)
{
int i, x, y, z, w, layer0, layer1, row0, row1;
unsigned char *o, *i0, *i1, *i2, *i3;
DPSOFTRAST_Texture *texture;
texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
if (texture->mipmaps <= 1)
return;
for (i = 1;i < texture->mipmaps;i++)
{
for (z = 0;z < texture->mipmap[i][4];z++)
{
layer0 = z*2;
layer1 = z*2+1;
if (layer1 >= texture->mipmap[i-1][4])
layer1 = texture->mipmap[i-1][4]-1;
for (y = 0;y < texture->mipmap[i][3];y++)
{
row0 = y*2;
row1 = y*2+1;
if (row1 >= texture->mipmap[i-1][3])
row1 = texture->mipmap[i-1][3]-1;
o = texture->bytes + texture->mipmap[i ][0] + 4*((texture->mipmap[i ][3] * z + y ) * texture->mipmap[i ][2]);
i0 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer0 + row0) * texture->mipmap[i-1][2]);
i1 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer0 + row1) * texture->mipmap[i-1][2]);
i2 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer1 + row0) * texture->mipmap[i-1][2]);
i3 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer1 + row1) * texture->mipmap[i-1][2]);
w = texture->mipmap[i][2];
if (layer1 > layer0)
{
if (texture->mipmap[i-1][2] > 1)
{
// average 3D texture
for (x = 0;x < w;x++, o += 4, i0 += 8, i1 += 8, i2 += 8, i3 += 8)
{
o[0] = (i0[0] + i0[4] + i1[0] + i1[4] + i2[0] + i2[4] + i3[0] + i3[4] + 4) >> 3;
o[1] = (i0[1] + i0[5] + i1[1] + i1[5] + i2[1] + i2[5] + i3[1] + i3[5] + 4) >> 3;
o[2] = (i0[2] + i0[6] + i1[2] + i1[6] + i2[2] + i2[6] + i3[2] + i3[6] + 4) >> 3;
o[3] = (i0[3] + i0[7] + i1[3] + i1[7] + i2[3] + i2[7] + i3[3] + i3[7] + 4) >> 3;
}
}
else
{
// average 3D mipmap with parent width == 1
for (x = 0;x < w;x++, o += 4, i0 += 8, i1 += 8)
{
o[0] = (i0[0] + i1[0] + i2[0] + i3[0] + 2) >> 2;
o[1] = (i0[1] + i1[1] + i2[1] + i3[1] + 2) >> 2;
o[2] = (i0[2] + i1[2] + i2[2] + i3[2] + 2) >> 2;
o[3] = (i0[3] + i1[3] + i2[3] + i3[3] + 2) >> 2;
}
}
}
else
{
if (texture->mipmap[i-1][2] > 1)
{
// average 2D texture (common case)
for (x = 0;x < w;x++, o += 4, i0 += 8, i1 += 8)
{
o[0] = (i0[0] + i0[4] + i1[0] + i1[4] + 2) >> 2;
o[1] = (i0[1] + i0[5] + i1[1] + i1[5] + 2) >> 2;
o[2] = (i0[2] + i0[6] + i1[2] + i1[6] + 2) >> 2;
o[3] = (i0[3] + i0[7] + i1[3] + i1[7] + 2) >> 2;
}
}
else
{
// 2D texture with parent width == 1
o[0] = (i0[0] + i1[0] + 1) >> 1;
o[1] = (i0[1] + i1[1] + 1) >> 1;
o[2] = (i0[2] + i1[2] + 1) >> 1;
o[3] = (i0[3] + i1[3] + 1) >> 1;
}
}
}
}
}
}
void DPSOFTRAST_Texture_UpdatePartial(int index, int mip, const unsigned char *pixels, int blockx, int blocky, int blockwidth, int blockheight)
{
DPSOFTRAST_Texture *texture;
unsigned char *dst;
texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
if (texture->binds)
DPSOFTRAST_Flush();
if (pixels)
{
dst = texture->bytes + texture->mipmap[0][1] +(-blocky * texture->mipmap[0][2] + blockx) * 4;
while (blockheight > 0)
{
dst -= texture->mipmap[0][2] * 4;
memcpy(dst, pixels, blockwidth * 4);
pixels += blockwidth * 4;
blockheight--;
}
}
DPSOFTRAST_Texture_CalculateMipmaps(index);
}
void DPSOFTRAST_Texture_UpdateFull(int index, const unsigned char *pixels)
{
DPSOFTRAST_Texture *texture;
texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
if (texture->binds)
DPSOFTRAST_Flush();
if (pixels)
{
int i, stride = texture->mipmap[0][2]*4;
unsigned char *dst = texture->bytes + texture->mipmap[0][1];
for (i = texture->mipmap[0][3];i > 0;i--)
{
dst -= stride;
memcpy(dst, pixels, stride);
pixels += stride;
}
}
DPSOFTRAST_Texture_CalculateMipmaps(index);
}
int DPSOFTRAST_Texture_GetWidth(int index, int mip)
{
DPSOFTRAST_Texture *texture;
texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
return texture->mipmap[mip][2];
}
int DPSOFTRAST_Texture_GetHeight(int index, int mip)
{
DPSOFTRAST_Texture *texture;
texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
return texture->mipmap[mip][3];
}
int DPSOFTRAST_Texture_GetDepth(int index, int mip)
{
DPSOFTRAST_Texture *texture;
texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
return texture->mipmap[mip][4];
}
unsigned char *DPSOFTRAST_Texture_GetPixelPointer(int index, int mip)
{
DPSOFTRAST_Texture *texture;
texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
if (texture->binds)
DPSOFTRAST_Flush();
return texture->bytes + texture->mipmap[mip][0];
}
void DPSOFTRAST_Texture_Filter(int index, DPSOFTRAST_TEXTURE_FILTER filter)
{
DPSOFTRAST_Texture *texture;
texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
if (!(texture->flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP) && filter > DPSOFTRAST_TEXTURE_FILTER_LINEAR)
{
dpsoftrast.errorstring = "DPSOFTRAST_Texture_Filter: requested filter mode requires mipmaps";
return;
}
if (texture->binds)
DPSOFTRAST_Flush();
texture->filter = filter;
}
static void DPSOFTRAST_Draw_FlushThreads(void);
static void DPSOFTRAST_Draw_SyncCommands(void)
{
if(dpsoftrast.usethreads) MEMORY_BARRIER;
dpsoftrast.drawcommand = dpsoftrast.commandpool.freecommand;
}
static void DPSOFTRAST_Draw_FreeCommandPool(int space)
{
DPSOFTRAST_State_Thread *thread;
int i;
int freecommand = dpsoftrast.commandpool.freecommand;
int usedcommands = dpsoftrast.commandpool.usedcommands;
if (usedcommands <= DPSOFTRAST_DRAW_MAXCOMMANDPOOL-space)
return;
DPSOFTRAST_Draw_SyncCommands();
for(;;)
{
int waitindex = -1;
int commandoffset;
usedcommands = 0;
for (i = 0; i < dpsoftrast.numthreads; i++)
{
thread = &dpsoftrast.threads[i];
commandoffset = freecommand - thread->commandoffset;
if (commandoffset < 0)
commandoffset += DPSOFTRAST_DRAW_MAXCOMMANDPOOL;
if (commandoffset > usedcommands)
{
waitindex = i;
usedcommands = commandoffset;
}
}
if (usedcommands <= DPSOFTRAST_DRAW_MAXCOMMANDPOOL-space || waitindex < 0)
break;
thread = &dpsoftrast.threads[waitindex];
Thread_LockMutex(thread->drawmutex);
if (thread->commandoffset != dpsoftrast.drawcommand)
{
thread->waiting = true;
if (thread->starving) Thread_CondSignal(thread->drawcond);
Thread_CondWait(thread->waitcond, thread->drawmutex);
thread->waiting = false;
}
Thread_UnlockMutex(thread->drawmutex);
}
dpsoftrast.commandpool.usedcommands = usedcommands;
}
#define DPSOFTRAST_ALIGNCOMMAND(size) \
((size) + ((COMMAND_SIZE - ((size)&(COMMAND_SIZE-1))) & (COMMAND_SIZE-1)))
#define DPSOFTRAST_ALLOCATECOMMAND(name) \
((DPSOFTRAST_Command_##name *) DPSOFTRAST_AllocateCommand( DPSOFTRAST_OPCODE_##name , DPSOFTRAST_ALIGNCOMMAND(sizeof( DPSOFTRAST_Command_##name ))))
static void *DPSOFTRAST_AllocateCommand(int opcode, int size)
{
DPSOFTRAST_Command *command;
int freecommand = dpsoftrast.commandpool.freecommand;
int usedcommands = dpsoftrast.commandpool.usedcommands;
int extra = sizeof(DPSOFTRAST_Command);
if (DPSOFTRAST_DRAW_MAXCOMMANDPOOL - freecommand < size)
extra += DPSOFTRAST_DRAW_MAXCOMMANDPOOL - freecommand;
if (usedcommands > DPSOFTRAST_DRAW_MAXCOMMANDPOOL - (size + extra))
{
if (dpsoftrast.usethreads)
DPSOFTRAST_Draw_FreeCommandPool(size + extra);
else
DPSOFTRAST_Draw_FlushThreads();
freecommand = dpsoftrast.commandpool.freecommand;
usedcommands = dpsoftrast.commandpool.usedcommands;
}
if (DPSOFTRAST_DRAW_MAXCOMMANDPOOL - freecommand < size)
{
command = (DPSOFTRAST_Command *) &dpsoftrast.commandpool.commands[freecommand];
command->opcode = DPSOFTRAST_OPCODE_Reset;
usedcommands += DPSOFTRAST_DRAW_MAXCOMMANDPOOL - freecommand;
freecommand = 0;
}
command = (DPSOFTRAST_Command *) &dpsoftrast.commandpool.commands[freecommand];
command->opcode = opcode;
command->commandsize = size;
freecommand += size;
if (freecommand >= DPSOFTRAST_DRAW_MAXCOMMANDPOOL)
freecommand = 0;
dpsoftrast.commandpool.freecommand = freecommand;
dpsoftrast.commandpool.usedcommands = usedcommands + size;
return command;
}
static void DPSOFTRAST_UndoCommand(int size)
{
int freecommand = dpsoftrast.commandpool.freecommand;
int usedcommands = dpsoftrast.commandpool.usedcommands;
freecommand -= size;
if (freecommand < 0)
freecommand += DPSOFTRAST_DRAW_MAXCOMMANDPOOL;
usedcommands -= size;
dpsoftrast.commandpool.freecommand = freecommand;
dpsoftrast.commandpool.usedcommands = usedcommands;
}
DEFCOMMAND(1, Viewport, int x; int y; int width; int height;)
static void DPSOFTRAST_Interpret_Viewport(DPSOFTRAST_State_Thread *thread, const DPSOFTRAST_Command_Viewport *command)
{
thread->viewport[0] = command->x;
thread->viewport[1] = command->y;
thread->viewport[2] = command->width;
thread->viewport[3] = command->height;
thread->validate |= DPSOFTRAST_VALIDATE_FB;
}
void DPSOFTRAST_Viewport(int x, int y, int width, int height)
{
DPSOFTRAST_Command_Viewport *command = DPSOFTRAST_ALLOCATECOMMAND(Viewport);
command->x = x;
command->y = y;
command->width = width;
command->height = height;
dpsoftrast.viewport[0] = x;
dpsoftrast.viewport[1] = y;
dpsoftrast.viewport[2] = width;
dpsoftrast.viewport[3] = height;
DPSOFTRAST_RecalcViewport(dpsoftrast.viewport, dpsoftrast.fb_viewportcenter, dpsoftrast.fb_viewportscale);
}
DEFCOMMAND(2, ClearColor, float r; float g; float b; float a;)
static void DPSOFTRAST_Interpret_ClearColor(DPSOFTRAST_State_Thread *thread, const DPSOFTRAST_Command_ClearColor *command)
{
int i, x1, y1, x2, y2, w, h, x, y;
int miny1, maxy1, miny2, maxy2;
int bandy;
unsigned int *p;
unsigned int c;
DPSOFTRAST_Validate(thread, DPSOFTRAST_VALIDATE_FB);
miny1 = thread->miny1;
maxy1 = thread->maxy1;
miny2 = thread->miny2;
maxy2 = thread->maxy2;
x1 = thread->fb_scissor[0];
y1 = thread->fb_scissor[1];
x2 = thread->fb_scissor[0] + thread->fb_scissor[2];
y2 = thread->fb_scissor[1] + thread->fb_scissor[3];
if (y1 < miny1) y1 = miny1;
if (y2 > maxy2) y2 = maxy2;
w = x2 - x1;
h = y2 - y1;
if (w < 1 || h < 1)
return;
// FIXME: honor fb_colormask?
c = DPSOFTRAST_BGRA8_FROM_RGBA32F(command->r,command->g,command->b,command->a);
for (i = 0;i < 4;i++)
{
if (!dpsoftrast.fb_colorpixels[i])
continue;
for (y = y1, bandy = min(y2, maxy1); y < y2; bandy = min(y2, maxy2), y = max(y, miny2))
for (;y < bandy;y++)
{
p = dpsoftrast.fb_colorpixels[i] + y * dpsoftrast.fb_width;
for (x = x1;x < x2;x++)
p[x] = c;
}
}
}
void DPSOFTRAST_ClearColor(float r, float g, float b, float a)
{
DPSOFTRAST_Command_ClearColor *command = DPSOFTRAST_ALLOCATECOMMAND(ClearColor);
command->r = r;
command->g = g;
command->b = b;
command->a = a;
}
DEFCOMMAND(3, ClearDepth, float depth;)
static void DPSOFTRAST_Interpret_ClearDepth(DPSOFTRAST_State_Thread *thread, DPSOFTRAST_Command_ClearDepth *command)
{
int x1, y1, x2, y2, w, h, x, y;