--- /dev/null
+/*
+ * Texture Filtering
+ * Version: 1.0
+ *
+ * Copyright (C) 2007 Hiroshi Morii All Rights Reserved.
+ * Email koolsmoky(at)users.sourceforge.net
+ * Web http://www.3dfxzone.it/koolsmoky
+ *
+ * this 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, or (at your option)
+ * any later version.
+ *
+ * this 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 GNU Make; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* use power of 2 texture size
+ * (0:disable, 1:enable, 2:3dfx) */
+#define POW2_TEXTURES 0
+
+/* check 8 bytes. use a larger value if needed. */
+#define PNG_CHK_BYTES 8
+
+#include "TxImage.h"
+#include "TxReSample.h"
+#include "TxDbg.h"
+#include <stdlib.h>
+#include "../Glide64/Gfx_1.3.h"
+
+boolean
+TxImage::getPNGInfo(FILE *fp, png_structp *png_ptr, png_infop *info_ptr)
+{
+ unsigned char sig[PNG_CHK_BYTES];
+
+ /* check for valid file pointer */
+ if (!fp)
+ return 0;
+
+ /* check if file is PNG */
+ if (fread(sig, 1, PNG_CHK_BYTES, fp) != PNG_CHK_BYTES)
+ return 0;
+
+ if (png_sig_cmp(sig, 0, PNG_CHK_BYTES) != 0)
+ return 0;
+
+ /* get PNG file info */
+ *png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+ if (!*png_ptr)
+ return 0;
+
+ *info_ptr = png_create_info_struct(*png_ptr);
+ if (!*info_ptr) {
+ png_destroy_read_struct(png_ptr, NULL, NULL);
+ return 0;
+ }
+
+ if (setjmp(png_jmpbuf(*png_ptr))) {
+ DBG_INFO(80, L"error reading png!\n");
+ png_destroy_read_struct(png_ptr, info_ptr, NULL);
+ return 0;
+ }
+
+ png_init_io(*png_ptr, fp);
+ png_set_sig_bytes(*png_ptr, PNG_CHK_BYTES);
+ png_read_info(*png_ptr, *info_ptr);
+
+ return 1;
+}
+
+uint8*
+TxImage::readPNG(FILE* fp, int* width, int* height, uint16* format)
+{
+ /* NOTE: returned image format is GR_TEXFMT_ARGB_8888 */
+
+ png_structp png_ptr;
+ png_infop info_ptr;
+ uint8 *image = NULL;
+ int bit_depth, color_type, interlace_type, compression_type, filter_type,
+ row_bytes, o_width, o_height, num_pas;
+
+ /* initialize */
+ *width = 0;
+ *height = 0;
+ *format = 0;
+
+ /* check if we have a valid png file */
+ if (!fp)
+ return NULL;
+
+ if (!getPNGInfo(fp, &png_ptr, &info_ptr)) {
+ INFO(80, L"error reading png file! png image is corrupt.\n");
+ return NULL;
+ }
+
+ png_get_IHDR(png_ptr, info_ptr,
+ (png_uint_32*)&o_width, (png_uint_32*)&o_height, &bit_depth, &color_type,
+ &interlace_type, &compression_type, &filter_type);
+
+ DBG_INFO(80, L"png format %d x %d bitdepth:%d color:%x interlace:%x compression:%x filter:%x\n",
+ o_width, o_height, bit_depth, color_type,
+ interlace_type, compression_type, filter_type);
+
+ /* transformations */
+
+ /* Rice hi-res textures
+ * _all.png
+ * _rgb.png, _a.png
+ * _ciByRGBA.png
+ * _allciByRGBA.png
+ */
+
+ /* strip if color channel is larger than 8 bits */
+ if (bit_depth > 8) {
+ png_set_strip_16(png_ptr);
+ bit_depth = 8;
+ }
+
+#if 1
+ /* These are not really required per Rice format spec,
+ * but is done just in case someone uses them.
+ */
+ /* convert palette color to rgb color */
+ if (color_type == PNG_COLOR_TYPE_PALETTE) {
+ png_set_palette_to_rgb(png_ptr);
+ color_type = PNG_COLOR_TYPE_RGB;
+ }
+
+ /* expand 1,2,4 bit gray scale to 8 bit gray scale */
+ if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
+ png_set_expand_gray_1_2_4_to_8(png_ptr);
+
+ /* convert gray scale or gray scale + alpha to rgb color */
+ if (color_type == PNG_COLOR_TYPE_GRAY ||
+ color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
+ png_set_gray_to_rgb(png_ptr);
+ color_type = PNG_COLOR_TYPE_RGB;
+ }
+#endif
+
+ /* add alpha channel if any */
+ if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) {
+ png_set_tRNS_to_alpha(png_ptr);
+ color_type = PNG_COLOR_TYPE_RGB_ALPHA;
+ }
+
+ /* convert rgb to rgba */
+ if (color_type == PNG_COLOR_TYPE_RGB) {
+ png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
+ color_type = PNG_COLOR_TYPE_RGB_ALPHA;
+ }
+
+ /* punt invalid formats */
+ if (color_type != PNG_COLOR_TYPE_RGB_ALPHA) {
+ png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+ DBG_INFO(80, L"Error: not PNG_COLOR_TYPE_RGB_ALPHA format!\n");
+ return NULL;
+ }
+
+ /*png_color_8p sig_bit;
+ if (png_get_sBIT(png_ptr, info_ptr, &sig_bit))
+ png_set_shift(png_ptr, sig_bit);*/
+
+ /* convert rgba to bgra */
+ png_set_bgr(png_ptr);
+
+ /* turn on interlace handling to cope with the weirdness
+ * of texture authors using interlaced format */
+ num_pas = png_set_interlace_handling(png_ptr);
+
+ /* update info structure */
+ png_read_update_info(png_ptr, info_ptr);
+
+ /* we only get here if ARGB8888 */
+ row_bytes = png_get_rowbytes(png_ptr, info_ptr);
+
+ /* allocate memory to read in image */
+ image = (uint8*)malloc(row_bytes * o_height);
+
+ /* read in image */
+ if (image) {
+ int pas, i;
+ uint8* tmpimage;
+
+ for (pas = 0; pas < num_pas; pas++) { /* deal with interlacing */
+ tmpimage = image;
+
+ for (i = 0; i < o_height; i++) {
+ /* copy row */
+ png_read_rows(png_ptr, &tmpimage, NULL, 1);
+ tmpimage += row_bytes;
+ }
+ }
+
+ /* read rest of the info structure */
+ png_read_end(png_ptr, info_ptr);
+
+ *width = (row_bytes >> 2);
+ *height = o_height;
+ *format = GR_TEXFMT_ARGB_8888;
+
+#if POW2_TEXTURES
+ /* next power of 2 size conversions */
+ /* NOTE: I can do this in the above loop for faster operations, but some
+ * texture packs require a workaround. see HACKALERT in nextPow2().
+ */
+
+ TxReSample txReSample = new TxReSample; // XXX: temporary. move to a better place.
+
+#if (POW2_TEXTURES == 2)
+ if (!txReSample->nextPow2(&image, width, height, 32, 1)) {
+#else
+ if (!txReSample->nextPow2(&image, width, height, 32, 0)) {
+#endif
+ if (image) {
+ free(image);
+ image = NULL;
+ }
+ *width = 0;
+ *height = 0;
+ *format = 0;
+ }
+
+ delete txReSample;
+
+#endif /* POW2_TEXTURES */
+ }
+
+ /* clean up */
+ png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+
+#ifdef DEBUG
+ if (!image) {
+ DBG_INFO(80, L"Error: failed to load png image!\n");
+ }
+#endif
+
+ return image;
+}
+
+boolean
+TxImage::writePNG(uint8* src, FILE* fp, int width, int height, int rowStride, uint16 format, uint8 *palette)
+{
+ png_structp png_ptr;
+ png_infop info_ptr;
+ png_color_8 sig_bit;
+ png_colorp palette_ptr = NULL;
+ png_bytep trans_ptr = NULL;
+ int bit_depth, color_type, row_bytes, num_palette;
+ int i;
+ //uint16 srcfmt, destfmt;
+
+ if (!src || !fp)
+ return 0;
+
+ png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+ if (png_ptr == NULL)
+ return 0;
+
+ info_ptr = png_create_info_struct(png_ptr);
+ if (info_ptr == NULL) {
+ png_destroy_write_struct(&png_ptr, NULL);
+ return 0;
+ }
+
+ if (png_jmpbuf(png_ptr)) {
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ return 0;
+ }
+
+ png_init_io(png_ptr, fp);
+
+ /* TODO: images must be converted to RGBA8888 or CI8,
+ * palettes need to be separated to A and RGB. */
+
+ /* N64 formats
+ * Format: 0 - RGBA, 1 - YUV, 2 - CI, 3 - IA, 4 - I
+ * Size: 0 - 4bit, 1 - 8bit, 2 - 16bit, 3 - 32 bit
+ * format = (Format << 8 | Size);
+ */
+
+ /* each channel is saved in 8bits for consistency */
+ switch (format) {
+ case 0x0002:/* RGBA5551 */
+ bit_depth = 8;
+ sig_bit.red = 5;
+ sig_bit.green = 5;
+ sig_bit.blue = 5;
+ sig_bit.alpha = 1;
+ color_type = PNG_COLOR_TYPE_RGB_ALPHA;
+ break;
+ case 0x0003:/* RGBA8888 */
+ case 0x0302:/* IA88 */
+ bit_depth = 8;
+ sig_bit.red = 8;
+ sig_bit.green = 8;
+ sig_bit.blue = 8;
+ sig_bit.alpha = 8;
+ color_type = PNG_COLOR_TYPE_RGB_ALPHA;
+ break;
+ case 0x0300:/* IA31 */
+ bit_depth = 8;
+ sig_bit.red = 3;
+ sig_bit.green = 3;
+ sig_bit.blue = 3;
+ sig_bit.alpha = 1;
+ color_type = PNG_COLOR_TYPE_RGB_ALPHA;
+ break;
+ case 0x0301:/* IA44 */
+ bit_depth = 8;
+ sig_bit.red = 4;
+ sig_bit.green = 4;
+ sig_bit.blue = 4;
+ sig_bit.alpha = 4;
+ color_type = PNG_COLOR_TYPE_RGB_ALPHA;
+ break;
+ case 0x0400:/* I4 */
+ bit_depth = 8;
+ sig_bit.red = 4;
+ sig_bit.green = 4;
+ sig_bit.blue = 4;
+ color_type = PNG_COLOR_TYPE_RGB;
+ break;
+ case 0x0401:/* I8 */
+ case 0x0402:/* I16 */
+ bit_depth = 8;
+ sig_bit.red = 8;
+ sig_bit.green = 8;
+ sig_bit.blue = 8;
+ color_type = PNG_COLOR_TYPE_RGB;
+ break;
+ case 0x0200:/* CI4 */
+ bit_depth = 8;
+ num_palette = 16;
+ color_type = PNG_COLOR_TYPE_PALETTE;
+ break;
+ case 0x0201:/* CI8 */
+ bit_depth = 8;
+ num_palette = 256;
+ color_type = PNG_COLOR_TYPE_PALETTE;
+ break;
+ case 0x0102:/* YUV ? */
+ case 0x0103:
+ default:
+ /* unsupported format */
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ return 0;
+ }
+
+ switch (color_type) {
+ case PNG_COLOR_TYPE_RGB_ALPHA:
+ case PNG_COLOR_TYPE_RGB:
+ //row_bytes = (bit_depth * width) >> 1;
+ row_bytes = rowStride;
+ png_set_bgr(png_ptr);
+ png_set_sBIT(png_ptr, info_ptr, &sig_bit);
+ break;
+ case PNG_COLOR_TYPE_PALETTE:
+ //row_bytes = (bit_depth * width) >> 3;
+ row_bytes = rowStride;
+ png_set_PLTE(png_ptr, info_ptr, palette_ptr, num_palette);
+ png_set_tRNS(png_ptr, info_ptr, trans_ptr, num_palette, 0);
+ }
+
+ //png_set_filter(png_ptr, 0, PNG_ALL_FILTERS);
+
+ //if (bit_depth == 16)
+ // png_set_swap(png_ptr);
+
+ //if (bit_depth < 8)
+ // png_set_packswap(png_ptr);
+
+ png_set_IHDR(png_ptr, info_ptr, width, height,
+ bit_depth, color_type, PNG_INTERLACE_NONE,
+ PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
+
+ //png_set_gAMA(png_ptr, info_ptr, 1.0);
+
+ png_write_info(png_ptr, info_ptr);
+ for (i = 0; i < height; i++) {
+ png_write_row(png_ptr, (png_bytep)src);
+ src += row_bytes;
+ }
+ png_write_end(png_ptr, info_ptr);
+
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+
+ //if (tex_ptr) delete [] tex_ptr;
+
+ return 1;
+}
+
+boolean
+TxImage::getBMPInfo(FILE* fp, BITMAPFILEHEADER* bmp_fhdr, BITMAPINFOHEADER* bmp_ihdr)
+{
+ /*
+ * read in BITMAPFILEHEADER
+ */
+
+ /* is this a BMP file? */
+ if (fread(&bmp_fhdr->bfType, 2, 1, fp) != 1)
+ return 0;
+
+ if (memcmp(&bmp_fhdr->bfType, "BM", 2) != 0)
+ return 0;
+
+ /* get file size */
+ if (fread(&bmp_fhdr->bfSize, 4, 1, fp) != 1)
+ return 0;
+
+ /* reserved 1 */
+ if (fread(&bmp_fhdr->bfReserved1, 2, 1, fp) != 1)
+ return 0;
+
+ /* reserved 2 */
+ if (fread(&bmp_fhdr->bfReserved2, 2, 1, fp) != 1)
+ return 0;
+
+ /* offset to the image data */
+ if (fread(&bmp_fhdr->bfOffBits, 4, 1, fp) != 1)
+ return 0;
+
+ /*
+ * read in BITMAPINFOHEADER
+ */
+
+ /* size of BITMAPINFOHEADER */
+ if (fread(&bmp_ihdr->biSize, 4, 1, fp) != 1)
+ return 0;
+
+ /* is this a Windows BMP? */
+ if (bmp_ihdr->biSize != 40)
+ return 0;
+
+ /* width of the bitmap in pixels */
+ if (fread(&bmp_ihdr->biWidth, 4, 1, fp) != 1)
+ return 0;
+
+ /* height of the bitmap in pixels */
+ if (fread(&bmp_ihdr->biHeight, 4, 1, fp) != 1)
+ return 0;
+
+ /* number of planes (always 1) */
+ if (fread(&bmp_ihdr->biPlanes, 2, 1, fp) != 1)
+ return 0;
+
+ /* number of bits-per-pixel. (1, 4, 8, 16, 24, 32) */
+ if (fread(&bmp_ihdr->biBitCount, 2, 1, fp) != 1)
+ return 0;
+
+ /* compression for a compressed bottom-up bitmap
+ * 0 : uncompressed format
+ * 1 : run-length encoded 4 bpp format
+ * 2 : run-length encoded 8 bpp format
+ * 3 : bitfield
+ */
+ if (fread(&bmp_ihdr->biCompression, 4, 1, fp) != 1)
+ return 0;
+
+ /* size of the image in bytes */
+ if (fread(&bmp_ihdr->biSizeImage, 4, 1, fp) != 1)
+ return 0;
+
+ /* horizontal resolution in pixels-per-meter */
+ if (fread(&bmp_ihdr->biXPelsPerMeter, 4, 1, fp) != 1)
+ return 0;
+
+ /* vertical resolution in pixels-per-meter */
+ if (fread(&bmp_ihdr->biYPelsPerMeter, 4, 1, fp) != 1)
+ return 0;
+
+ /* number of color indexes in the color table that are actually used */
+ if (fread(&bmp_ihdr->biClrUsed, 4, 1, fp) != 1)
+ return 0;
+
+ /* the number of color indexes that are required for displaying */
+ if (fread(&bmp_ihdr->biClrImportant, 4, 1, fp) != 1)
+ return 0;
+
+ return 1;
+}
+
+uint8*
+TxImage::readBMP(FILE* fp, int* width, int* height, uint16* format)
+{
+ /* NOTE: returned image format;
+ * 4, 8bit palette bmp -> GR_TEXFMT_P_8
+ * 24, 32bit bmp -> GR_TEXFMT_ARGB_8888
+ */
+
+ uint8 *image = NULL;
+ uint8 *image_row = NULL;
+ uint8 *tmpimage = NULL;
+ unsigned int row_bytes, pos;
+ int i, j;
+ /* Windows Bitmap */
+ BITMAPFILEHEADER bmp_fhdr;
+ BITMAPINFOHEADER bmp_ihdr;
+
+ /* initialize */
+ *width = 0;
+ *height = 0;
+ *format = 0;
+
+ /* check if we have a valid bmp file */
+ if (!fp)
+ return NULL;
+
+ if (!getBMPInfo(fp, &bmp_fhdr, &bmp_ihdr)) {
+ INFO(80, L"error reading bitmap file! bitmap image is corrupt.\n");
+ return NULL;
+ }
+
+ DBG_INFO(80, L"bmp format %d x %d bitdepth:%d compression:%x offset:%d\n",
+ bmp_ihdr.biWidth, bmp_ihdr.biHeight, bmp_ihdr.biBitCount,
+ bmp_ihdr.biCompression, bmp_fhdr.bfOffBits);
+
+ /* rowStride in bytes */
+ row_bytes = (bmp_ihdr.biWidth * bmp_ihdr.biBitCount) >> 3;
+ /* align to 4bytes boundary */
+ row_bytes = (row_bytes + 3) & ~3;
+
+ /* Rice hi-res textures */
+ if (!(bmp_ihdr.biBitCount == 8 || bmp_ihdr.biBitCount == 4 || bmp_ihdr.biBitCount == 32 || bmp_ihdr.biBitCount == 24) ||
+ bmp_ihdr.biCompression != 0) {
+ DBG_INFO(80, L"Error: incompatible bitmap format!\n");
+ return NULL;
+ }
+
+ switch (bmp_ihdr.biBitCount) {
+ case 8:
+ case 32:
+ /* 8 bit, 32 bit bitmap */
+ image = (uint8*)malloc(row_bytes * bmp_ihdr.biHeight);
+ if (image) {
+ tmpimage = image;
+ pos = bmp_fhdr.bfOffBits + row_bytes * (bmp_ihdr.biHeight - 1);
+ for (i = 0; i < bmp_ihdr.biHeight; i++) {
+ /* read in image */
+ fseek(fp, pos, SEEK_SET);
+ if (fread(tmpimage, 1, row_bytes, fp) != row_bytes)
+ ERRLOG("fread() failed for row of '%i' bytes in 8/32-bit BMP image", row_bytes);
+ tmpimage += row_bytes;
+ pos -= row_bytes;
+ }
+ }
+ break;
+ case 4:
+ /* 4bit bitmap */
+ image = (uint8*)malloc((row_bytes * bmp_ihdr.biHeight) << 1);
+ image_row = (uint8*)malloc(row_bytes);
+ if (image && image_row) {
+ tmpimage = image;
+ pos = bmp_fhdr.bfOffBits + row_bytes * (bmp_ihdr.biHeight - 1);
+ for (i = 0; i < bmp_ihdr.biHeight; i++) {
+ /* read in image */
+ fseek(fp, pos, SEEK_SET);
+ if (fread(image_row, 1, row_bytes, fp) != row_bytes)
+ ERRLOG("fread failed for row of '%i' bytes in 4-bit BMP image", row_bytes);
+ /* expand 4bpp to 8bpp. stuff 4bit values into 8bit comps. */
+ for (j = 0; j < (int) row_bytes; j++) {
+ tmpimage[j << 1] = image_row[j] & 0x0f;
+ tmpimage[(j << 1) + 1] = (image_row[j] & 0xf0) >> 4;
+ }
+ tmpimage += (row_bytes << 1);
+ pos -= row_bytes;
+ }
+ free(image_row);
+ } else {
+ if (image_row) free(image_row);
+ if (image) free(image);
+ image = NULL;
+ }
+ break;
+ case 24:
+ /* 24 bit bitmap */
+ image = (uint8*)malloc((bmp_ihdr.biWidth * bmp_ihdr.biHeight) << 2);
+ image_row = (uint8*)malloc(row_bytes);
+ if (image && image_row) {
+ tmpimage = image;
+ pos = bmp_fhdr.bfOffBits + row_bytes * (bmp_ihdr.biHeight - 1);
+ for (i = 0; i < bmp_ihdr.biHeight; i++) {
+ /* read in image */
+ fseek(fp, pos, SEEK_SET);
+ if (fread(image_row, 1, row_bytes, fp) != row_bytes)
+ ERRLOG("fread failed for row of '%i' bytes in 24-bit BMP image", row_bytes);
+ /* convert 24bpp to 32bpp. */
+ for (j = 0; j < bmp_ihdr.biWidth; j++) {
+ tmpimage[(j << 2)] = image_row[j * 3];
+ tmpimage[(j << 2) + 1] = image_row[j * 3 + 1];
+ tmpimage[(j << 2) + 2] = image_row[j * 3 + 2];
+ tmpimage[(j << 2) + 3] = 0xFF;
+ }
+ tmpimage += (bmp_ihdr.biWidth << 2);
+ pos -= row_bytes;
+ }
+ free(image_row);
+ } else {
+ if (image_row) free(image_row);
+ if (image) free(image);
+ image = NULL;
+ }
+ }
+
+ if (image) {
+ *width = (row_bytes << 3) / bmp_ihdr.biBitCount;
+ *height = bmp_ihdr.biHeight;
+
+ switch (bmp_ihdr.biBitCount) {
+ case 8:
+ case 4:
+ *format = GR_TEXFMT_P_8;
+ break;
+ case 32:
+ case 24:
+ *format = GR_TEXFMT_ARGB_8888;
+ }
+
+#if POW2_TEXTURES
+ /* next power of 2 size conversions */
+ /* NOTE: I can do this in the above loop for faster operations, but some
+ * texture packs require a workaround. see HACKALERT in nextPow2().
+ */
+
+ TxReSample txReSample = new TxReSample; // XXX: temporary. move to a better place.
+
+#if (POW2_TEXTURES == 2)
+ if (!txReSample->nextPow2(&image, width, height, 8, 1)) {
+#else
+ if (!txReSample->nextPow2(&image, width, height, 8, 0)) {
+#endif
+ if (image) {
+ free(image);
+ image = NULL;
+ }
+ *width = 0;
+ *height = 0;
+ *format = 0;
+ }
+
+ delete txReSample;
+
+#endif /* POW2_TEXTURES */
+ }
+
+#ifdef DEBUG
+ if (!image) {
+ DBG_INFO(80, L"Error: failed to load bmp image!\n");
+ }
+#endif
+
+ return image;
+}
+
+boolean
+TxImage::getDDSInfo(FILE *fp, DDSFILEHEADER *dds_fhdr)
+{
+ /*
+ * read in DDSFILEHEADER
+ */
+
+ /* is this a DDS file? */
+ if (fread(&dds_fhdr->dwMagic, 4, 1, fp) != 1)
+ return 0;
+
+ if (memcmp(&dds_fhdr->dwMagic, "DDS ", 4) != 0)
+ return 0;
+
+ if (fread(&dds_fhdr->dwSize, 4, 1, fp) != 1)
+ return 0;
+
+ /* get file flags */
+ if (fread(&dds_fhdr->dwFlags, 4, 1, fp) != 1)
+ return 0;
+
+ /* height of dds in pixels */
+ if (fread(&dds_fhdr->dwHeight, 4, 1, fp) != 1)
+ return 0;
+
+ /* width of dds in pixels */
+ if (fread(&dds_fhdr->dwWidth, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->dwLinearSize, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->dwDepth, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->dwMipMapCount, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->dwReserved1, 4 * 11, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->ddpf.dwSize, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->ddpf.dwFlags, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->ddpf.dwFourCC, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->ddpf.dwRGBBitCount, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->ddpf.dwRBitMask, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->ddpf.dwGBitMask, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->ddpf.dwBBitMask, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->ddpf.dwRGBAlphaBitMask, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->dwCaps1, 4, 1, fp) != 1)
+ return 0;
+
+ if (fread(&dds_fhdr->dwCaps2, 4, 1, fp) != 1)
+ return 0;
+
+ return 1;
+}
+
+uint8*
+TxImage::readDDS(FILE* fp, int* width, int* height, uint16* format)
+{
+ uint8 *image = NULL;
+ DDSFILEHEADER dds_fhdr;
+ uint16 tmpformat = 0;
+
+ /* initialize */
+ *width = 0;
+ *height = 0;
+ *format = 0;
+
+ /* check if we have a valid dds file */
+ if (!fp)
+ return NULL;
+
+ if (!getDDSInfo(fp, &dds_fhdr)) {
+ INFO(80, L"error reading dds file! dds image is corrupt.\n");
+ return NULL;
+ }
+
+ DBG_INFO(80, L"dds format %d x %d HeaderSize %d LinearSize %d\n",
+ dds_fhdr.dwWidth, dds_fhdr.dwHeight, dds_fhdr.dwSize, dds_fhdr.dwLinearSize);
+
+ if (!(dds_fhdr.dwFlags & (DDSD_CAPS|DDSD_WIDTH|DDSD_HEIGHT|DDSD_PIXELFORMAT|DDSD_LINEARSIZE))) {
+ DBG_INFO(80, L"Error: incompatible dds format!\n");
+ return NULL;
+ }
+
+ if ((dds_fhdr.dwFlags & DDSD_MIPMAPCOUNT) && dds_fhdr.dwMipMapCount != 1) {
+ DBG_INFO(80, L"Error: mipmapped dds not supported!\n");
+ return NULL;
+ }
+
+ if (!((dds_fhdr.ddpf.dwFlags & DDPF_FOURCC) && dds_fhdr.dwCaps2 == 0)) {
+ DBG_INFO(80, L"Error: not fourcc standard texture!\n");
+ return NULL;
+ }
+
+ if (memcmp(&dds_fhdr.ddpf.dwFourCC, "DXT1", 4) == 0) {
+ DBG_INFO(80, L"DXT1 format\n");
+ /* compensate for missing LinearSize */
+ dds_fhdr.dwLinearSize = (dds_fhdr.dwWidth * dds_fhdr.dwHeight) >> 1;
+ tmpformat = GR_TEXFMT_ARGB_CMP_DXT1;
+ } else if (memcmp(&dds_fhdr.ddpf.dwFourCC, "DXT3", 4) == 0) {
+ DBG_INFO(80, L"DXT3 format\n");
+ dds_fhdr.dwLinearSize = dds_fhdr.dwWidth * dds_fhdr.dwHeight;
+ tmpformat = GR_TEXFMT_ARGB_CMP_DXT3;
+ } else if (memcmp(&dds_fhdr.ddpf.dwFourCC, "DXT5", 4) == 0) {
+ DBG_INFO(80, L"DXT5 format\n");
+ dds_fhdr.dwLinearSize = dds_fhdr.dwWidth * dds_fhdr.dwHeight;
+ tmpformat = GR_TEXFMT_ARGB_CMP_DXT5;
+ } else {
+ DBG_INFO(80, L"Error: not DXT1 or DXT3 or DXT5 format!\n");
+ return NULL;
+ }
+
+ /* read in image */
+ image = (uint8*)malloc(dds_fhdr.dwLinearSize);
+ if (image) {
+ *width = dds_fhdr.dwWidth;
+ *height = dds_fhdr.dwHeight;
+ *format = tmpformat;
+
+ fseek(fp, 128, SEEK_SET); /* size of header is 128 bytes */
+ if (fread(image, 1, dds_fhdr.dwLinearSize, fp) != dds_fhdr.dwLinearSize)
+ ERRLOG("fread failed to read DDS image of '%i' bytes", dds_fhdr.dwLinearSize);
+ }
+
+ return image;
+}
notaz.gp2x.de / mupen64plus-pandora.git / blobdiff