mirror of
https://github.com/libretro/RetroArch.git
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184 lines
4.8 KiB
C
184 lines
4.8 KiB
C
/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
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* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
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*
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* Some code herein may be based on code found in BSNES.
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*
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* SSNES is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with SSNES.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "image.h"
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#include "file.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stddef.h>
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#include "general.h"
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#ifdef HAVE_SDL_IMAGE
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#include "SDL_image.h"
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bool texture_image_load(const char *path, struct texture_image *out_img)
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{
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SDL_Surface *img = IMG_Load(path);
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if (!img)
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return false;
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out_img->width = img->w;
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out_img->height = img->h;
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size_t size = out_img->width * out_img->height * sizeof(uint32_t);
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out_img->pixels = malloc(size);
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if (!out_img->pixels)
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{
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SDL_FreeSurface(img);
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return false;
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}
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const SDL_PixelFormat *fmt = img->format;
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SSNES_LOG("SDL_image: %dx%d @ %d bpp\n", img->w, img->h, img->format->BitsPerPixel);
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if (img->format->BitsPerPixel == 32)
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{
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for (unsigned y = 0; y < img->h; y++)
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{
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uint32_t *dst = out_img->pixels + y * img->w;
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const uint32_t *src = (const uint32_t*)img->pixels + y * img->pitch / sizeof(uint32_t);
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for (unsigned x = 0; x < img->w; x++)
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{
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uint32_t r = (src[x] & fmt->Rmask) >> fmt->Rshift;
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uint32_t g = (src[x] & fmt->Gmask) >> fmt->Gshift;
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uint32_t b = (src[x] & fmt->Bmask) >> fmt->Bshift;
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uint32_t a = (src[x] & fmt->Amask) >> fmt->Ashift;
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dst[x] = (r << 24) | (g << 16) | (b << 8) | a;
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}
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}
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}
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else if (img->format->BitsPerPixel == 24)
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{
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for (unsigned y = 0; y < img->h; y++)
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{
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uint32_t *dst = out_img->pixels + y * img->w;
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const uint8_t *src = (const uint8_t*)img->pixels + y * img->pitch;
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for (unsigned x = 0; x < img->w; x++)
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{
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// Correct?
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uint32_t color = 0;
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color |= src[3 * x + 0] << 0;
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color |= src[3 * x + 1] << 8;
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color |= src[3 * x + 2] << 16;
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uint32_t r = (color & fmt->Rmask) >> fmt->Rshift;
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uint32_t g = (color & fmt->Gmask) >> fmt->Gshift;
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uint32_t b = (color & fmt->Bmask) >> fmt->Bshift;
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dst[x] = (r << 24) | (g << 16) | (b << 8) | 0xff;
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}
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}
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}
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else
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{
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SSNES_ERR("8-bit and 16-bit image support are not implemented.\n");
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SDL_FreeSurface(img);
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return false;
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}
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SDL_FreeSurface(img);
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return true;
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}
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#else
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bool texture_image_load(const char *path, struct texture_image *out_img)
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{
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// TODO: Check more gracefully.
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if (!strstr(path, ".tga"))
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return false;
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void *raw_buf = NULL;
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ssize_t len = read_file(path, &raw_buf);
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if (len < 0)
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return false;
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uint8_t *buf = raw_buf;
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if (buf[2] != 2) // Uncompressed RGB
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{
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free(buf);
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return false;
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}
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unsigned width = 0;
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unsigned height = 0;
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uint8_t info[6];
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memcpy(info, buf + 12, 6);
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width = info[0] + ((unsigned)info[1] * 256);
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height = info[2] + ((unsigned)info[3] * 256);
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unsigned bits = info[4];
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SSNES_LOG("Loaded TGA: (%ux%u @ %u bpp)\n", width, height, bits);
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unsigned size = width * height * sizeof(uint32_t);
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out_img->pixels = malloc(size);
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out_img->width = width;
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out_img->height = height;
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if (!out_img->pixels)
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{
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free(buf);
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return false;
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}
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const uint8_t *tmp = buf + 18;
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if (bits == 32)
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{
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for (unsigned i = 0; i < width * height; i++)
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{
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uint32_t r = tmp[i * 4 + 2];
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uint32_t g = tmp[i * 4 + 1];
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uint32_t b = tmp[i * 4 + 0];
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uint32_t a = tmp[i * 4 + 3];
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out_img->pixels[i] = (r << 24) | (g << 16) | (b << 8) | a;
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}
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}
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else if (bits == 24)
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{
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for (unsigned i = 0; i < width * height; i++)
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{
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uint32_t r = tmp[i * 3 + 2];
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uint32_t g = tmp[i * 3 + 1];
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uint32_t b = tmp[i * 3 + 0];
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uint32_t a = 0xff;
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out_img->pixels[i] = (r << 24) | (g << 16) | (b << 8) | a;
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}
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}
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else
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{
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free(buf);
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free(out_img->pixels);
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out_img->pixels = NULL;
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return false;
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}
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free(buf);
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return true;
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}
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#endif
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