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GL_utils.c
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#ifdef _WINDOWS
#include <windows.h>
#include <io.h>
#endif
#include <fcntl.h>
#include <GL/gl.h>
#include "doomdata.h"
#include "r_defs.h"
#include "gldefs.h"
#include "v_video.h"
#include "w_wad.h"
#include "z_zone.h"
#define GLD_TRANSPARENT 0
#define GLD_COLORED 1
void lfprintf(char *message, ... );
int MakeRGBTexture(int dw, int dh);
int MakeRGBATexture(dboolean clamp, dboolean smooth, int dw, int dh);
int MakeGreyTexture(dboolean clamp, dboolean smooth, int dw, int dh);
void V_DrawPatchBuff(int, int, unsigned char *, patch_t *);
unsigned char PointPattern[16*16] = { 0, 0, 0, 0, 0, 0, 0, 31, 31, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 31, 63, 63, 31, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 31, 63, 91, 91, 63, 31, 0, 0, 0, 0, 0,
0, 0, 0, 0, 47, 63, 91,127,127, 91, 63, 47, 0, 0, 0, 0,
0, 0, 0, 47, 79, 91,127,159,159,127, 91, 79, 47, 0, 0, 0,
0, 0, 31, 63,107,143,159,191,191,159,143,107, 63, 31, 0, 0,
0, 31, 63, 91,127,159,191,223,223,191,159,127, 91, 63, 31, 0,
31, 63, 91,127,159,191,223,255,255,223,191,159,127, 91, 63, 31,
31, 63, 91,127,159,191,223,255,255,223,191,159,127, 91, 63, 31,
0, 31, 63, 91,127,159,191,223,223,191,159,127, 91, 63, 31, 0,
0, 0, 31, 63,107,143,159,191,191,159,143,107, 63, 31, 0, 0,
0, 0, 0, 47, 79, 91,127,159,159,127, 91, 79, 47, 0, 0, 0,
0, 0, 0, 0, 47, 63, 91,127,127, 91, 63, 47, 0, 0, 0, 0,
0, 0, 0, 0, 0, 31, 63, 91, 91, 63, 31, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 31, 63, 63, 31, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 31, 31, 0, 0, 0, 0, 0, 0, 0 };
//unsigned char PointPattern[16*16];
unsigned char TexRaw[512*512];
unsigned char SkyRaw[1024*128];
unsigned char Transparent[512*512];
unsigned char TexAlpha[512*512];
unsigned char RawBuff[512*512];
int TexWide, TexHigh;
GLubyte *TexRGB, *MipMaps[16][32768];
dboolean TexTransparent = false;
extern dboolean GL_3Dlabs;
typedef struct
{
unsigned char r;
unsigned char g;
unsigned char b;
}MY_PAL;
extern MY_PAL gamepal[256];
MY_PAL statpal[256];
DW_TexList TexList[1024];
extern int gl_alphatest;
extern int gl_widetex;
// A single patch from a texture definition,
// basically a rectangular area within
// the texture rectangle.
typedef struct
{
// Block origin (allways UL),
// which has allready accounted
// for the internal origin of the patch.
int originx;
int originy;
int patch;
} texpatch_t;
// A maptexturedef_t describes a rectangular texture,
// which is composed of one or more mappatch_t structures
// that arrange graphic patches.
typedef struct
{
// Keep name for switch changing, etc.
char name[8];
short width;
short height;
// All the patches[patchcount]
// are drawn back to front into the cached texture.
short patchcount;
texpatch_t patches[1];
} texture_t;
void InitGLPalette(int red, int green, int blue)
{
int i;
for (i = 0; i < 256; i++)
{
statpal[i].r = red;
statpal[i].g = green;
statpal[i].b = blue;
}
}
int CreateColorMap(int red, int green, int blue)
{
int r, c, d, h, t, m, n, TempTexName;
unsigned char TexData[4];
TexWide = 1;
TexHigh = 1;
TexData[0] = red;
TexData[1] = green;
TexData[2] = blue;
TexData[3] = 255;
glGenTextures(1, &TempTexName);
glBindTexture(GL_TEXTURE_2D, TempTexName);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// Define the 2D texture image.
glPixelStorei(GL_UNPACK_ALIGNMENT, 4); // Force 4-byte alignment
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TexWide, TexHigh, 0, GL_RGBA, GL_UNSIGNED_BYTE, TexData);
glBindTexture(GL_TEXTURE_2D, 0);
return(TempTexName);
}
int CreatePointLightMap(int red, int green, int blue, dboolean alphaonly)
{
int r, c, d, h, t, m, n, TempTexName;
TexWide = 16;
TexHigh = 16;
TexRGB = (GLubyte *)malloc(TexWide*(TexHigh*4));
t = (TexHigh - 1);
for (r = 0, d = 0; r < (TexWide*TexHigh); r++, d += 4)
{
if (!alphaonly)
{
//TexRGB[d] = (unsigned char)(((float)PointPattern[r] / 255.0f) * red);
//TexRGB[d+1] = (unsigned char)(((float)PointPattern[r] / 255.0f) * green);
//TexRGB[d+2] = (unsigned char)(((float)PointPattern[r] / 255.0f) * blue);
if (PointPattern[r] == 0)
{
TexRGB[d+3] = 0;
}
else
{
TexRGB[d] = 255;
TexRGB[d+1] = 255;
TexRGB[d+2] = 255;
TexRGB[d+3] = 255;
}
}
else
{
TexRGB[d] = 0;
TexRGB[d+1] = 0;
TexRGB[d+2] = 0;
TexRGB[d+3] = PointPattern[r];
}
}
glGenTextures(1, &TempTexName);
glBindTexture(GL_TEXTURE_2D, TempTexName);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// Define the 2D texture image.
glPixelStorei(GL_UNPACK_ALIGNMENT, 4); // Force 4-byte alignment
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TexWide, TexHigh, 0, GL_RGBA, GL_UNSIGNED_BYTE, TexRGB);
glBindTexture(GL_TEXTURE_2D, 0);
free(TexRGB);
return(TempTexName);
}
void GeneratePointPattern()
{
int i, x, base, color;
return;
memset(PointPattern, 0, 256);
base = 63;
for (i = 0; i < 8; i++)
{
for (x = (7 - i); x < 8; x++)
{
color = base - ((8 - x) * 32);
if (color < 0)
color = 0;
PointPattern[(i*16)+x] = color;
PointPattern[((i*16)+15)-x] = color;
PointPattern[((15-i)*16)+x] = color;
PointPattern[(((15-i)*16)+15)-x] = color;
}
base += 32;
}
}
extern texture_t** textures;
int GL_LoadSkyTop( char *filename )
{
int TempTexName, fn, s, d;
unsigned char *texels;
BITMAPFILEHEADER bmfh;
BITMAPINFOHEADER bmi;
RGBQUAD *bmpPalette;
fn = open(filename, O_RDONLY | O_BINARY );
read(fn, &bmfh, sizeof(BITMAPFILEHEADER));
read(fn, &bmi, sizeof(BITMAPINFOHEADER));
TexWide = bmi.biWidth;
TexHigh = bmi.biHeight;
bmpPalette = (RGBQUAD *)malloc(sizeof(RGBQUAD)*256);
read(fn, bmpPalette, (sizeof(RGBQUAD)*256));
texels = (unsigned char *)malloc(TexWide*TexHigh);
lseek(fn, bmfh.bfOffBits, SEEK_SET);
read(fn, texels, (TexWide*TexHigh));
close(fn);
TexRGB = (GLubyte *)malloc(TexWide*(TexHigh*3));
for (s = 0, d = 0; s < (TexWide*TexHigh); s++)
{
TexRGB[d++] = bmpPalette[texels[s]].rgbRed;
TexRGB[d++] = bmpPalette[texels[s]].rgbGreen;
TexRGB[d++] = bmpPalette[texels[s]].rgbBlue;
}
glGenTextures(1, &TempTexName);
glBindTexture(GL_TEXTURE_2D, TempTexName);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// Define the 2D texture image.
glPixelStorei(GL_UNPACK_ALIGNMENT, 4); // Force 4-byte alignment
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glTexImage2D(GL_TEXTURE_2D, 0, 3, TexWide, TexHigh, 0, GL_RGB, GL_UNSIGNED_BYTE, TexRGB);
glBindTexture(GL_TEXTURE_2D, 0);
free(TexRGB);
free(texels);
free(bmpPalette);
return(TempTexName);
}
int GL_LoadTexture(int TexNumb)
{
int x, n, r, wide, s, d, glw,w;
int TempTexNumb = 0, iPower;
short sx, sy, fields;
int px, py;
if (TexList[TexNumb].DWide > 256)
{
return 0;
}
TexWide = sx = TexList[TexNumb].DWide;
TexHigh = sy = TexList[TexNumb].DHigh;
for (x = 0, iPower = 2; ((x < 8) && (TexWide > iPower)); x++)
iPower = iPower * 2;
if ((iPower >= TexWide) && (iPower <= 256))
TexList[TexNumb].GLWide = iPower;
for (x = 0, iPower = 2; ((x < 8) && (TexHigh > iPower)); x++)
iPower = iPower * 2;
if ((iPower >= TexHigh) && (iPower <= 256))
TexList[TexNumb].GLHigh = iPower;
wide = 1;
while (TexList[TexNumb].GLHigh > ((TexList[TexNumb].GLWide * wide) * 8))
{
wide *= 2;
}
TexList[TexNumb].GLWide *= wide;
// Don't think we need this for height...
while (TexList[TexNumb].GLWide > (TexList[TexNumb].GLHigh * 8))
{
TexList[TexNumb].GLHigh = TexList[TexNumb].GLHigh * 2;
}
TexWide = TexList[TexNumb].GLWide;
TexHigh = TexList[TexNumb].GLHigh;
for (n = 0; n < (TexWide*TexHigh); n++)
{
TexRaw[n] = 110;
Transparent[n] = GLD_TRANSPARENT;
}
fields = textures[TexList[TexNumb].Number]->patchcount;
for (n = 0; n < fields; n++)
{
px = textures[TexList[TexNumb].Number]->patches[n].originx;
py = textures[TexList[TexNumb].Number]->patches[n].originy;
V_DrawPatchOffsetBuff( px,py, TexRaw,
TexWide, TexHigh,
textures[TexList[TexNumb].Number]->patches[n].patch);
}
if (wide > 1)
{
s = 0;
d = TexList[TexNumb].DWide;
glw = TexWide;
w = TexList[TexNumb].DWide;
for (r = 0; r < TexHigh; r++)
{
memcpy(&TexRaw[d], &TexRaw[s], w);
memcpy(&Transparent[d], &Transparent[s], w);
s += glw;
d += glw;
}
TexList[TexNumb].DWide *= 2;
}
memcpy(TexAlpha, Transparent, (TexWide*TexHigh));
if (gl_alphatest == 1)
{
TempTexNumb = MakeRGBATexture(false, true, TexList[TexNumb].DWide, TexList[TexNumb].DHigh);
}
else
{
TempTexNumb = MakeRGBATexture(false, false, TexList[TexNumb].DWide, TexList[TexNumb].DHigh);
}
return(TempTexNumb);
}
int GL_LoadSkyTexture(int TexNumb, int *SkyTex)
{
int x, n, r, wide, s, d, glw,w;
int TempTexNumb = 0, iPower;
short sx, sy, fields;
int px, py, part, parts;
if ((TexList[TexNumb].DWide > 1024) || (TexList[TexNumb].DWide > 1024))
{
SkyTex[0] = 0;
SkyTex[1] = 0;
SkyTex[2] = 0;
SkyTex[3] = 0;
return 1;
}
TexWide = sx = TexList[TexNumb].DWide;
TexHigh = sy = TexList[TexNumb].DHigh;
for (x = 0, iPower = 2; ((x < 9) && (TexWide > iPower)); x++)
iPower = iPower * 2;
if ((iPower >= TexWide) && (iPower <= 1024))
TexList[TexNumb].GLWide = iPower;
for (x = 0, iPower = 2; ((x < 8) && (TexHigh > iPower)); x++)
iPower = iPower * 2;
if ((iPower >= TexHigh) && (iPower <= 256))
TexList[TexNumb].GLHigh = iPower;
TexWide = TexList[TexNumb].GLWide;
TexHigh = TexList[TexNumb].GLHigh;
parts = TexWide / 256;
memset(SkyRaw, 0, TexWide*TexHigh);
fields = textures[TexList[TexNumb].Number]->patchcount;
for (n = 0; n < fields; n++)
{
px = textures[TexList[TexNumb].Number]->patches[n].originx;
py = textures[TexList[TexNumb].Number]->patches[n].originy;
V_DrawPatchOffsetBuff( px,py, SkyRaw,
//TexList[TexNumb].DWide, TexList[TexNumb].DHigh,
TexWide, TexHigh,
textures[TexList[TexNumb].Number]->patches[n].patch);
}
TexWide = 256;
for (part = 0; part < parts; part++)
{
s = part * 256;
d = 0;
glw = 256;
w = TexList[TexNumb].DWide;
memset(TexRaw, 0, 256*w);
for (r = 0; r < TexHigh; r++)
{
memcpy(&TexRaw[d], &SkyRaw[s], glw);
s += w;
d += glw;
}
TempTexNumb = MakeRGBTexture(256, TexList[TexNumb].DHigh);
SkyTex[part] = TempTexNumb;
}
while(part < 4)
{
SkyTex[part] = SkyTex[0];
part++;
}
return(part);
}
extern int firstflat;
int GL_LoadFlatTexture(int TexNumb)
{
int TempTexNumb, n;
unsigned char *lump, *pixels;
lump = W_CacheLumpNum(firstflat+TexList[TexNumb].Number, PU_CACHE);
TexWide = TexList[TexNumb].GLWide = TexList[TexNumb].DWide;
TexHigh = TexList[TexNumb].GLHigh = TexList[TexNumb].DHigh;
pixels = &lump[0];
for (n = 0; n < TexList[TexNumb].GLWide*TexList[TexNumb].GLHigh; n++)
{
TexRaw[n] = pixels[n];
TexAlpha[n] = GLD_COLORED;
}
TempTexNumb = MakeRGBATexture(false, false, TexList[TexNumb].DWide, TexList[TexNumb].DHigh);
return( TempTexNumb );
}
int Translucent = false;
//
// GL_MakeGreyFontTexture
// Masks a column based masked pic into an OpenGL texture
//
int GL_MakeGreyFontTexture(patch_t *Sprite, GLTexData *Tex, dboolean smooth)
{
static int x, ixsize, iysize;
unsigned short *tshort;
int i, j, n;
int iOffSet, iPower;
int TempTexNumb;
int iGLWide, iGLHigh;
tshort = (unsigned short *)Sprite;
ixsize = *tshort;
tshort++;
iysize = *tshort;
TexWide = ixsize;
TexHigh = iysize;
for (x = 0, iPower = 2; ((x < 8) && (TexWide > iPower)); x++)
iPower = iPower * 2;
if ((iPower >= TexWide) && (iPower <= 512))
iGLWide = iPower;
for (x = 0, iPower = 2; ((x < 8) && (TexHigh > iPower)); x++)
iPower = iPower * 2;
if ((iPower >= TexHigh) && (iPower <= 512))
iGLHigh = iPower;
while ((iGLWide / iGLHigh) > 8)
iGLHigh *= 2;
while ((iGLHigh / iGLWide) > 8)
iGLWide *= 2;
TexWide = iGLWide;
TexHigh = iGLHigh;
for (n = 0; n < ixsize*iysize; n++)
{
RawBuff[n] = 0;
Transparent[n] = GLD_TRANSPARENT;
}
V_DrawPatchBuff(0, 0, RawBuff, Sprite);
for (n = 0; n < (TexWide*TexHigh); n++)
{
TexRaw[n] = 0;
TexAlpha[n] = GLD_TRANSPARENT;
}
for (i = 0, n = 0; i < iysize; i++)
{
iOffSet = i * TexWide;
for (j = 0; j < ixsize; j++, n++)
{
TexRaw[iOffSet+j] = RawBuff[n];
TexAlpha[iOffSet+j] = Transparent[n];
}
}
if (gl_alphatest == 1)
Translucent = Tex->Translucent;
else
Translucent = 0;
if (gl_alphatest == 1)
{
TempTexNumb = MakeGreyTexture(true, smooth, ixsize, iysize);
}
else
{
TempTexNumb = MakeGreyTexture(true, false, ixsize, iysize);
}
Tex->TexName = TempTexNumb;
Tex->Width = (float)Sprite->width;
Tex->Height = (float)Sprite->height;
Tex->XDisp = (float)Sprite->width / (float)TexWide;
Tex->YDisp = 1.0f - ((float)Sprite->height / (float)TexHigh);
Tex->LeftOff = (float)Sprite->leftoffset;
Tex->TopOff = (float)Sprite->topoffset;
Tex->glWidth = (float)TexWide;
Tex->glHeight = (float)TexHigh;
Translucent = false;
return TempTexNumb;
}
//
// GL_MakeSpriteTexture
// Masks a column based masked pic into an OpenGL texture
//
int GL_MakeSpriteTexture(patch_t *Sprite, GLTexData *Tex, dboolean smooth)
{
static int x, ixsize, iysize, cwidth;
unsigned short *tshort;
int i, j, n;
int iOffSet, iPower;
int TempTexNumb;
int iGLWide, iGLHigh;
if (Sprite == NULL)
return;
//ixsize = Sprite->width-Sprite->leftoffset;
//iysize = Sprite->height-Sprite->topoffset;
tshort = (unsigned short *)Sprite;
ixsize = *tshort;
tshort++;
iysize = *tshort;
if (ixsize > 256)
{
lfprintf("\ntexture size %dx%d", ixsize, iysize);
}
//ixsize = Sprite->width;
//iysize = Sprite->height;
TexWide = ixsize;
TexHigh = iysize;
for (x = 0, iPower = 2; ((x < 8) && (TexWide > iPower)); x++)
iPower = iPower * 2;
if ((iPower >= TexWide) && (iPower <= 512))
iGLWide = iPower;
for (x = 0, iPower = 2; ((x < 8) && (TexHigh > iPower)); x++)
iPower = iPower * 2;
if ((iPower >= TexHigh) && (iPower <= 512))
iGLHigh = iPower;
while ((iGLWide / iGLHigh) > 8)
iGLHigh *= 2;
while ((iGLHigh / iGLWide) > 8)
iGLWide *= 2;
TexWide = iGLWide;
TexHigh = iGLHigh;
for (n = 0; n < ixsize*iysize; n++)
{
RawBuff[n] = 0;
Transparent[n] = GLD_TRANSPARENT;
}
V_DrawPatchBuff(0, 0, RawBuff, Sprite);
for (n = 0; n < (TexWide*TexHigh); n++)
{
TexRaw[n] = 0;
TexAlpha[n] = GLD_TRANSPARENT;
}
if ((ixsize > 256) && (!gl_widetex))
{
TexWide = 256;
cwidth = 256;
}
else
{
cwidth = ixsize;
}
iOffSet = 0;
for (i = 0, n = 0; i < iysize; i++)
{
memcpy(&TexRaw[iOffSet], &RawBuff[n], cwidth);
memcpy(&TexAlpha[iOffSet], &Transparent[n], cwidth);
n += ixsize;
iOffSet += TexWide;
}
if (gl_alphatest == 1)
Translucent = Tex->Translucent;
else
Translucent = 0;
if (gl_alphatest == 1)
{
//TempTexNumb = MakeRGBATexture(true, smooth, ixsize, iysize);
TempTexNumb = MakeRGBATexture(true, smooth, cwidth, iysize);
}
else
{
//TempTexNumb = MakeRGBATexture(true, false, ixsize, iysize);
TempTexNumb = MakeRGBATexture(true, smooth, cwidth, iysize);
}
Tex->TexName = TempTexNumb;
//Tex->Width = (float)Sprite->width;
Tex->Width = (float)cwidth;
Tex->Height = (float)Sprite->height;
//Tex->XDisp = (float)Sprite->width / (float)TexWide;
Tex->XDisp = (float)cwidth / (float)TexWide;
Tex->YDisp = 1.0f - ((float)Sprite->height / (float)TexHigh);
Tex->LeftOff = (float)Sprite->leftoffset;
Tex->TopOff = (float)Sprite->topoffset;
Tex->glWidth = (float)TexWide;
Tex->glHeight = (float)TexHigh;
Translucent = false;
return TempTexNumb;
}
// GL_MakeWideSpriteTexture
// Masks a column based masked pic into OpenGL textures
//
int GL_MakeWideSpriteTexture(patch_t *Screen, GLTexData *Tex)
{
static int x, ixsize, iysize;
unsigned short *tshort;
int i, j, n, d, s;
int TempTexNumb;
int iGLWide, iGLHigh, iPower;
tshort = (unsigned short *)Screen;
ixsize = *tshort;
tshort++;
//ixsize = Screen->width;
iysize = *tshort;
//iysize = Screen->height;
TexHigh = iysize;
for (x = 0, iPower = 2; ((x < 8) && (TexHigh > iPower)); x++)
iPower = iPower * 2;
if ((iPower >= TexHigh) && (iPower <= 512))
iGLHigh = iPower;
TexHigh = iGLHigh;
TexWide = 256;
memset(RawBuff, 0, ixsize*iysize);
V_DrawPatchBuff(0, 0, RawBuff, Screen);
memset(TexRaw, 0, 256*iysize);
memset(TexRaw, GLD_TRANSPARENT, 256*iysize);
for (i = 0, d = 0, s = 0; i < iysize; i++)
{
memcpy(&TexRaw[d], &RawBuff[s], 256);
memcpy(&TexAlpha[d], &Transparent[s], 256);
d += 256;
s += ixsize;
}
TexWide = 256;
if (gl_alphatest == 1)
{
TempTexNumb = MakeRGBATexture(true, true, 256, TexHigh);
}
else
{
TempTexNumb = MakeRGBATexture(true, false, 256, TexHigh);
}
Tex[0].TexName = TempTexNumb;
Tex[0].Width = (float)TexWide;
Tex[0].Height = (float)iysize;
Tex[0].XDisp = 1.0f;
Tex[0].YDisp = 1.0f - ((float)iysize/(float)TexWide);
Tex[0].LeftOff = 0.0f;
Tex[0].TopOff = 0.0f;
Tex[0].glWidth = 256.0f;
Tex[0].glHeight = TexHigh;
TexWide = ixsize - 256;
for (x = 0, iPower = 2; ((x < 8) && (TexWide > iPower)); x++)
iPower = iPower * 2;
if ((iPower >= TexWide) && (iPower <= 512))
iGLWide = iPower;
memset(TexRaw, GLD_TRANSPARENT, 256*iysize);
memset(TexRaw, 0, TexWide*TexHigh);
for (i = 0, d = 0, s = 256; i < iysize; i++)
{
memcpy(&TexRaw[d], &RawBuff[s], ixsize-256);
memcpy(&TexAlpha[d], &Transparent[s], ixsize-256);
d += TexWide;
s += ixsize;
}
if (gl_alphatest == 1)
{
TempTexNumb = MakeRGBATexture(true, true, TexWide, TexHigh);
}
else
{
TempTexNumb = MakeRGBATexture(true, false, TexWide, TexHigh);
}
Tex[1].TexName = TempTexNumb;
Tex[1].Width = ixsize-256;
Tex[1].Height = (float)iysize;
Tex[1].XDisp = (float)(ixsize-256)/(float)TexWide;
Tex[1].YDisp = 1.0f - ((float)iysize/(float)TexHigh);
Tex[1].LeftOff = 0.0f;
Tex[1].TopOff = 0.0f;
Tex[1].glWidth = TexWide;
Tex[1].glHeight = TexHigh;
return TempTexNumb;
}
typedef struct
{
unsigned char r;
unsigned char g;
unsigned char b;
unsigned char a;
}rgba_t;
void AntiAlias(rgba_t *inbuff, rgba_t *outbuff, int w, int h)
{
int x, y, s, d, n;
short mr, mg, mb;
for (y = 0, d = 0, s = 0; y < h; y++)
{
for (x = 0; x < w; x++, s++, d++)
{
if (inbuff[s].a != 0)
{
outbuff[s].r = inbuff[s].r;
outbuff[s].g = inbuff[s].g;
outbuff[s].b = inbuff[s].b;
outbuff[s].a = inbuff[s].a;
}
else
{
n = 0;
mr = 0;
mg = 0;
mb = 0;
if (y > 0)
{
if (x < (w-1))
{
if (inbuff[s-(w-1)].a != 0)
{
mr += inbuff[s-(w-1)].r;
mg += inbuff[s-(w-1)].g;
mb += inbuff[s-(w-1)].b;
n++;
}
}
if (inbuff[s-w].a != 0)
{
mr += inbuff[s-w].r;
mg += inbuff[s-w].g;
mb += inbuff[s-w].b;
n++;
}
if (x > 0)
{
if (inbuff[s-(w+1)].a != 0)
{
mr += inbuff[s-(w+1)].r;
mg += inbuff[s-(w+1)].g;
mb += inbuff[s-(w+1)].b;
n++;
}
}
}
if (x > 0)
{
if (inbuff[s-1].a != 0)
{
mr += inbuff[s-1].r;
mg += inbuff[s-1].g;
mb += inbuff[s-1].b;
n++;
}
}
if (x < (w-1))
{
if (inbuff[s+1].a != 0)
{
mr += inbuff[s+1].r;
mg += inbuff[s+1].g;
mb += inbuff[s+1].b;
n++;
}
}
if (y < (h-1))
{
if (x < (w-1))
{
if (inbuff[s+(w+1)].a != 0)
{
mr += inbuff[s+(w+1)].r;
mg += inbuff[s+(w+1)].g;
mb += inbuff[s+(w+1)].b;
n++;
}
}
if (inbuff[s+w].a != 0)
{
mr += inbuff[s+w].r;
mg += inbuff[s+w].g;
mb += inbuff[s+w].b;
n++;
}
if (x > 0)
{
if (inbuff[s+(w-1)].a != 0)
{
mr += inbuff[s+(w-1)].r;
mg += inbuff[s+(w-1)].g;
mb += inbuff[s+(w-1)].b;
n++;
}
}
}
if (n > 0)
{
outbuff[s].r = mr / n;
outbuff[s].g = mg / n;
outbuff[s].b = mb / n;
}
else
{
outbuff[s].r = 0;
outbuff[s].g = 0;
outbuff[s].b = 0;
}
outbuff[s].a = inbuff[s].a;
}
}
}
}
//
// GL_MakeScreenTexture
// Draws a column based full-screen pic into OpenGL textures
//
int GL_MakeScreenTexture(patch_t *Screen, GLTexData *Tex)
{
static int x, ixsize, iysize;
unsigned short *tshort;
int i, j, n, d, s;
int TempTexNumb;
tshort = (unsigned short *)Screen;
ixsize = *tshort;
tshort++;
iysize = *tshort;
if ((ixsize != 320) || (iysize != 200))
{
// This is not a full screen image...
return 0;
}
memset(RawBuff, 0, ixsize*iysize);
V_DrawPatchBuff(0, 0, RawBuff, Screen);
memset(TexRaw, 0, 256*200);
for (i = 0, d = 0, s = 0; i < 200; i++)
{
memcpy(&TexRaw[d], &RawBuff[s], 256);
d += 256;
s += 320;
}
TexWide = 256;
TexHigh = 256;
TempTexNumb = MakeRGBTexture(256, 256);
Tex[0].TexName = TempTexNumb;
Tex[0].Width = (float)256;
Tex[0].Height = (float)200;
Tex[0].XDisp = 1.0f;
Tex[0].YDisp = 1.0f - (200.0f/256.0f);
Tex[0].LeftOff = 0.0f;
Tex[0].TopOff = 0.0f;
Tex[0].glWidth = 256.0f;
Tex[0].glHeight = 256.0f;
memset(TexRaw, 0, 64*200);
for (i = 0, d = 0, s = 256; i < 200; i++)
{
memcpy(&TexRaw[d], &RawBuff[s], 64);
d += 64;
s += 320;
}
TexWide = 64;
TexHigh = 256;
TempTexNumb = MakeRGBTexture(64, 256);
Tex[1].TexName = TempTexNumb;
Tex[1].Width = 64.0f;
Tex[1].Height = 200.0f;
Tex[1].XDisp = 1.0f;
Tex[1].YDisp = 1.0f-(200.0f/256.0f);
Tex[1].LeftOff = 0.0f;
Tex[1].TopOff = 0.0f;
Tex[1].glWidth = 64.0f;
Tex[1].glHeight = 256.0f;
return TempTexNumb;
}
int MakeRGBATexture(dboolean clamp, dboolean smooth, int dw, int dh)
{
int r, c, d, h, t, m, n, TempTexName;
unsigned char *TexAa;
TexRGB = (GLubyte *)malloc(TexWide*(TexHigh*4));
TexTransparent = false;
t = (TexHigh - 1);
for (r = 0; r < TexHigh; r++)
{
h = t - r;
m = (r * TexWide);
for (c = 0; c < TexWide; c++)
{
n = m + c;
d = ((h * TexWide) * 4) + (c * 4);
TexRGB[d] = statpal[TexRaw[n]].r;
TexRGB[d+1] = statpal[TexRaw[n]].g;
TexRGB[d+2] = statpal[TexRaw[n]].b;
if (TexAlpha[n] == GLD_COLORED)
{
if (Translucent > 0)
TexRGB[d+3] = Translucent;
else
TexRGB[d+3] = 255;
}
else
{
TexRGB[d+3] = 0;
if ((c < dw) && (r < dh))
{
TexTransparent = true;
}
}
}
}
glGenTextures(1, &TempTexName);
glBindTexture(GL_TEXTURE_2D, TempTexName);
if ((smooth == true) && (TexTransparent == true))
{
TexAa = (GLubyte *)malloc(TexWide*(TexHigh*4));
for (r = 0; r < (TexWide*TexHigh*4); r++)
TexAa[r] = TexRGB[r];
AntiAlias( (rgba_t *)TexAa, (rgba_t *)TexRGB, TexWide, TexHigh );
free(TexAa);
}
if (clamp == true)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);