/* gl_textures.c Texture format setup. Copyright (C) 1996-1997 Id Software, Inc. Copyright (C) 2001 Ragnvald Maartmann-Moe IV 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: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA $Id$ */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #ifdef HAVE_STRING_H # include #endif #ifdef HAVE_STRINGS_H # include #endif #include #include "QF/cmd.h" #include "QF/compat.h" #include "QF/console.h" #include "QF/crc.h" #include "draw.h" #include "glquake.h" #include "sbar.h" #include "screen.h" #include "QF/sys.h" extern unsigned char d_15to8table[65536]; extern cvar_t *gl_picmip; typedef struct { int texnum; char identifier[64]; int width, height; int bytesperpixel; qboolean mipmap; unsigned short crc; // LordHavoc: CRC for texure validation } gltexture_t; static gltexture_t gltextures[MAX_GLTEXTURES]; static int numgltextures = 0; typedef struct { char *name; int minimize, maximize; } glmode_t; static glmode_t modes[] = { {"GL_NEAREST", GL_NEAREST, GL_NEAREST}, {"GL_LINEAR", GL_LINEAR, GL_LINEAR}, {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST}, {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR}, {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST}, {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR} }; typedef struct { char *name; int format; } glformat_t; static glformat_t formats[] = { /* 1-4 are standardly supported formats by GL, not exactly the evil magic numbers they appear to be. Provided mostly as a way to avoid ugly code for supporting a shortcut, partly for consistency. --Despair */ /* EXT_paletted_textures {"COLOR_INDEX1_EXT", COLOR_INDEX1_EXT}. {"COLOR_INDEX2_EXT", COLOR_INDEX2_EXT}, {"COLOR_INDEX4_EXT", COLOR_INDEX4_EXT}, {"COLOR_INDEX8_EXT", COLOR_INDEX8_EXT}, {"COLOR_INDEX12_EXT", COLOR_INDEX12_EXT}, {"COLOR_INDEX16_EXT", COLOR_INDEX16_EXT}, */ /* EXT_cymyka {"CMYK_EXT", CMYK_EXT}, {"CMYKA_EXT", CMYKA_EXT}, */ /* EXT_422_pixels {"422_EXT", 422_EXT}, {"422_REV_EXT", 422_REV_EXT}, {"422_AVERAGE_EXT", 422_AVERAGE_EXT}, {"422_REV_AVERAGE_EXT", 422_REV_AVERAGE_EXT}, */ /* EXT_abgr {"ABGR_EXT", ABGR_EXT}, */ /* EXT_bgra {"BGR_EXT", BGR_EXT}, {"BGRA_EXT", BGRA_EXT}, */ /* ARB_texture_compression * only applicable for CompressedTexImage and CompressedTexSubimage * which will complicate upload paths. *ponder* {"COMPRESSED_ALPHA_ARB", COMPRESSED_ALPHA_ARB}, {"COMPRESSED_LUMINANCE_ARB", COMPRESSED_LUMINANCE_ARB}, {"COMPRESSED_LUMINANCE_ALPHA_ARB", COMPRESSED_LUMINANCE_ALPHA_ARB}, {"COMPRESSED_INTENSITY_ARB", COMPRESSED_INTENSITY_ARB}, {"COMPRESSED_RGB_ARB", COMPRESSED_RGB_ARB}, {"COMPRESSED_RGBA_ARB", COMPRESSED_RGBA_ARB}, */ {"1", 1}, {"2", 2}, {"3", 3}, {"4", 4}, {"GL_ALPHA", GL_ALPHA}, {"GL_ALPHA4", GL_ALPHA4}, {"GL_ALPHA8", GL_ALPHA8}, {"GL_ALPHA12", GL_ALPHA12}, {"GL_ALPHA16", GL_ALPHA16}, {"GL_LUMINANCE", GL_LUMINANCE}, {"GL_LUMINANCE4", GL_LUMINANCE4}, {"GL_LUMINANCE8", GL_LUMINANCE8}, {"GL_LUMINANCE12", GL_LUMINANCE12}, {"GL_LUMINANCE16", GL_LUMINANCE16}, {"GL_LUMINANCE_ALPHA", GL_LUMINANCE_ALPHA}, {"GL_LUMINANCE4_ALPHA4", GL_LUMINANCE4_ALPHA4}, {"GL_LUMINANCE6_ALPHA2", GL_LUMINANCE6_ALPHA2}, {"GL_LUMINANCE8_ALPHA8", GL_LUMINANCE8_ALPHA8}, {"GL_LUMINANCE12_ALPHA4", GL_LUMINANCE12_ALPHA4}, {"GL_LUMINANCE12_ALPHA12", GL_LUMINANCE12_ALPHA12}, {"GL_LUMINANCE16_ALPHA16", GL_LUMINANCE16_ALPHA16}, {"GL_INTENSITY", GL_INTENSITY}, {"GL_INTENSITY4", GL_INTENSITY4}, {"GL_INTENSITY8", GL_INTENSITY8}, {"GL_INTENSITY12", GL_INTENSITY12}, {"GL_INTENSITY16", GL_INTENSITY16}, {"GL_R3_G3_B2", GL_R3_G3_B2}, {"GL_RGB", GL_RGB}, {"GL_RGB4", GL_RGB4}, {"GL_RGB5", GL_RGB5}, {"GL_RGB8", GL_RGB8}, {"GL_RGB10", GL_RGB10}, {"GL_RGB12", GL_RGB12}, {"GL_RGB16", GL_RGB16}, {"GL_RGBA", GL_RGBA}, {"GL_RGBA2", GL_RGBA2}, {"GL_RGBA4", GL_RGBA4}, {"GL_RGB5_A1", GL_RGB5_A1}, {"GL_RGBA8", GL_RGBA8}, {"GL_RGB10_A2", GL_RGB10_A2}, {"GL_RGBA12", GL_RGBA12}, {"GL_RGBA16", GL_RGBA16} }; int gl_filter_min = GL_LINEAR_MIPMAP_NEAREST, gl_filter_max = GL_LINEAR; int gl_alpha_format = 4, gl_lightmap_format = 4, gl_solid_format = 3; void GL_TextureMode_f (void) { int i; gltexture_t *glt; if (Cmd_Argc () == 1) { for (i = 0; i < 6; i++) if (gl_filter_min == modes[i].minimize) { Con_Printf ("%s\n", modes[i].name); return; } Con_Printf ("current filter is unknown?\n"); return; } for (i = 0; i < 6; i++) { if (!strcasecmp (modes[i].name, Cmd_Argv (1))) break; } if (i == 6) { Con_Printf ("bad filter name\n"); return; } gl_filter_min = modes[i].minimize; gl_filter_max = modes[i].maximize; // change all the existing mipmap texture objects for (i = 0, glt = gltextures; i < numgltextures; i++, glt++) { if (glt->mipmap) { glBindTexture (GL_TEXTURE_2D, glt->texnum); glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min); glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max); } } } int GL_TextureDepth_f (int format) { int i; for (i = 0; i < 42; i++) { if (format == formats[i].format) { Con_Printf ("%s\n", formats[i].name); return GL_RGBA; } Con_Printf ("current texture format is unknown?\n"); return GL_RGBA; } for (i = 0; i < 42; i++) { if (!strcasecmp (formats[i].name, Cmd_Argv (1))) break; } if (i == 42) { Con_Printf ("bad texture format name\n"); return GL_RGBA; } return formats[i].format; } static void GL_ResampleTexture (unsigned int *in, int inwidth, int inheight, unsigned int *out, int outwidth, int outheight) { int i, j; unsigned int *inrow; unsigned int frac, fracstep; if (!outwidth || !outheight) return; fracstep = inwidth * 0x10000 / outwidth; for (i = 0; i < outheight; i++, out += outwidth) { inrow = in + inwidth * (i * inheight / outheight); frac = fracstep >> 1; for (j = 0; j < outwidth; j ++) { out[j] = inrow[frac >> 16]; frac += fracstep; } } } #if defined(GL_SHARED_TEXTURE_PALETTE_EXT) && defined(HAVE_GL_COLOR_INDEX8_EXT) static void GL_Resample8BitTexture (unsigned char *in, int inwidth, int inheight, unsigned char *out, int outwidth, int outheight) { int i, j; unsigned char *inrow; unsigned int frac, fracstep; if (!outwidth || !outheight) return; fracstep = inwidth * 0x10000 / outwidth; for (i = 0; i < outheight; i++, out += outwidth) { inrow = in + inwidth * (i * inheight / outheight); frac = fracstep >> 1; for (j = 0; j < outwidth; j ++) { out[j] = inrow[frac >> 16]; frac += fracstep; } } } #endif /* GL_MipMap Operates in place, quartering the size of the texture. */ static void GL_MipMap (byte * in, int width, int height) { int i, j; byte *out; width <<= 2; height >>= 1; out = in; for (i = 0; i < height; i++, in += width) { for (j = 0; j < width; j += 8, out += 4, in += 8) { out[0] = (in[0] + in[4] + in[width + 0] + in[width + 4]) >> 2; out[1] = (in[1] + in[5] + in[width + 1] + in[width + 5]) >> 2; out[2] = (in[2] + in[6] + in[width + 2] + in[width + 6]) >> 2; out[3] = (in[3] + in[7] + in[width + 3] + in[width + 7]) >> 2; } } } /* GL_MipMap8Bit Mipping for 8 bit textures */ #if defined(GL_SHARED_TEXTURE_PALETTE_EXT) && defined(HAVE_GL_COLOR_INDEX8_EXT) static void GL_MipMap8Bit (byte * in, int width, int height) { int i, j; byte *out; unsigned short r, g, b; byte *at1, *at2, *at3, *at4; height >>= 1; out = in; for (i = 0; i < height; i++, in += width) for (j = 0; j < width; j += 2, out += 1, in += 2) { at1 = (byte *) & d_8to24table[in[0]]; at2 = (byte *) & d_8to24table[in[1]]; at3 = (byte *) & d_8to24table[in[width + 0]]; at4 = (byte *) & d_8to24table[in[width + 1]]; r = (at1[0] + at2[0] + at3[0] + at4[0]); r >>= 5; g = (at1[1] + at2[1] + at3[1] + at4[1]); g >>= 5; b = (at1[2] + at2[2] + at3[2] + at4[2]); b >>= 5; out[0] = d_15to8table[(r << 0) + (g << 5) + (b << 10)]; } } #endif static void GL_Upload32 (unsigned int *data, int width, int height, qboolean mipmap, qboolean alpha) { unsigned int *scaled; int scaled_width, scaled_height, samples; if (!width || !height) return; // Null texture // Snap the height and width to a power of 2. for (scaled_width = 1; scaled_width < width; scaled_width <<= 1); for (scaled_height = 1; scaled_height < height; scaled_height <<= 1); scaled_width >>= gl_picmip->int_val; scaled_height >>= gl_picmip->int_val; scaled_width = min (scaled_width, gl_max_size->int_val); scaled_height = min (scaled_height, gl_max_size->int_val); if (!(scaled = malloc (scaled_width * scaled_height * sizeof (GLuint)))) Sys_Error ("GL_LoadTexture: too big"); samples = alpha ? gl_alpha_format : gl_solid_format; // If the real width/height and the 'scaled' width/height then we // rescale it. if (scaled_width == width && scaled_height == height) { memcpy (scaled, data, width * height * sizeof (GLuint)); } else { GL_ResampleTexture (data, width, height, scaled, scaled_width, scaled_height); } glTexImage2D (GL_TEXTURE_2D, 0, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled); if (mipmap) { int miplevel = 0; while (scaled_width > 1 || scaled_height > 1) { GL_MipMap ((byte *) scaled, scaled_width, scaled_height); scaled_width >>= 1; scaled_height >>= 1; scaled_width = max (scaled_width, 1); scaled_height = max (scaled_height, 1); miplevel++; glTexImage2D (GL_TEXTURE_2D, miplevel, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled); } } if (mipmap) { glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min); glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max); } else { glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max); if (gl_picmip->int_val) glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); else glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max); } free (scaled); } /* GL_Upload8_EXT If we have shared or global palettes, upload an 8-bit texture. If we don't, this function does nothing. */ void GL_Upload8_EXT (byte * data, int width, int height, qboolean mipmap, qboolean alpha) { #if defined(GL_SHARED_TEXTURE_PALETTE_EXT) && defined(HAVE_GL_COLOR_INDEX8_EXT) byte *scaled; int scaled_width, scaled_height; // Snap the height and width to a power of 2. for (scaled_width = 1; scaled_width < width; scaled_width <<= 1); for (scaled_height = 1; scaled_height < height; scaled_height <<= 1); scaled_width >>= gl_picmip->int_val; scaled_height >>= gl_picmip->int_val; scaled_width = min (scaled_width, gl_max_size->int_val); scaled_height = min (scaled_height, gl_max_size->int_val); if (!(scaled = malloc (scaled_width * scaled_height))) Sys_Error ("GL_LoadTexture: too big"); // If the real width/height and the 'scaled' width/height then we // rescale it. if (scaled_width == width && scaled_height == height) { memcpy (scaled, data, width * height); } else { GL_Resample8BitTexture (data, width, height, scaled, scaled_width, scaled_height); } glTexImage2D (GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, scaled); if (mipmap) { int miplevel; miplevel = 0; while (scaled_width > 1 || scaled_height > 1) { GL_MipMap8Bit ((byte *) scaled, scaled_width, scaled_height); scaled_width >>= 1; scaled_height >>= 1; scaled_width = max (scaled_width, 1); scaled_height = max (scaled_height, 1); miplevel++; glTexImage2D (GL_TEXTURE_2D, miplevel, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, scaled); } } if (mipmap) { glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min); glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max); } else { glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max); if (gl_picmip->int_val) glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); else glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max); } free (scaled); #endif } extern qboolean VID_Is8bit (void); void GL_Upload8 (byte * data, int width, int height, qboolean mipmap, qboolean alpha) { unsigned int *trans = NULL; int i, s, p; s = width * height; trans = malloc (s * sizeof (unsigned int)); // if there are no transparent pixels, make it a 3 component // texture even if it was specified as otherwise if (alpha) { alpha = false; for (i = 0; i < s; i++) { p = data[i]; if (p == 255) alpha = true; trans[i] = d_8to24table[p]; } } else { if (s & 3) Sys_Error ("GL_Upload8: width*height divisible by 3"); for (i = 0; i < s; i += 4) { trans[i] = d_8to24table[data[i]]; trans[i + 1] = d_8to24table[data[i + 1]]; trans[i + 2] = d_8to24table[data[i + 2]]; trans[i + 3] = d_8to24table[data[i + 3]]; } } #if defined(GL_SHARED_TEXTURE_PALETTE_EXT) && defined(HAVE_GL_COLOR_INDEX8_EXT) if (VID_Is8bit () && !alpha) { GL_Upload8_EXT (data, width, height, mipmap, alpha); } else { #else { #endif GL_Upload32 (trans, width, height, mipmap, alpha); } free (trans); } int GL_LoadTexture (char *identifier, int width, int height, byte * data, qboolean mipmap, qboolean alpha, int bytesperpixel) { gltexture_t *glt; int i, crc; // LordHavoc: now just using a standard CRC for texture validation crc = CRC_Block (data, width * height * bytesperpixel); // see if the texture is already present if (identifier[0]) { for (i = 0, glt = gltextures; i < numgltextures; i++, glt++) { if (strequal (identifier, glt->identifier)) { if (crc != glt->crc || width != glt->width || height != glt->height || bytesperpixel != glt->bytesperpixel) goto SetupTexture; else return gltextures[i].texnum; } } } if (numgltextures == MAX_GLTEXTURES) Sys_Error ("numgltextures == MAX_GLTEXTURES"); glt = &gltextures[numgltextures]; numgltextures++; strncpy (glt->identifier, identifier, sizeof (glt->identifier) - 1); glt->identifier[sizeof (glt->identifier) - 1] = '\0'; glt->texnum = texture_extension_number; texture_extension_number++; SetupTexture: glt->crc = crc; glt->width = width; glt->height = height; glt->bytesperpixel = bytesperpixel; glt->mipmap = mipmap; glBindTexture (GL_TEXTURE_2D, glt->texnum); switch (glt->bytesperpixel) { case 1: GL_Upload8 (data, width, height, mipmap, alpha); break; case 4: GL_Upload32 ((GLuint *) data, width, height, mipmap, alpha); break; default: Sys_Error ("SetupTexture: unknown bytesperpixel %i", glt->bytesperpixel); } return glt->texnum; }