Mercurial > hg > dmlib
view dmimage.c @ 45:b30430da2815
Rename mixing template.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Mon, 01 Oct 2012 01:07:19 +0300 |
parents | 32250b436bca |
children | dd59a650a318 |
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/* * DMLib * -- Bitmap image conversion and loading * Programmed and designed by Matti 'ccr' Hamalainen * (C) Copyright 2012 Tecnic Software productions (TNSP) */ #include "dmimage.h" #define STBI_FAILURE_USERMSG 1 #define STBI_NO_STDIO 1 #define STBI_NO_HDR 1 #include "stb_image.c" SDL_Surface *dmCreateRGBSurfaceFrom(void *data, const int width, const int height, const int depth, const int pitch, const int rmask, const int gmask, const int bmask, const int amask) { SDL_Surface *tmp, *pixtmp, *result = NULL; tmp = SDL_CreateRGBSurfaceFrom(data, width, height, depth, pitch, bmask, gmask, rmask, amask); pixtmp = SDL_CreateRGBSurface(SDL_SWSURFACE | SDL_SRCALPHA, 10, 10, 32, rmask, gmask, bmask, amask); if (tmp != NULL && pixtmp != NULL) { result = SDL_ConvertSurface(tmp, pixtmp->format, SDL_SWSURFACE | SDL_SRCALPHA); SDL_FreeSurface(tmp); } if (pixtmp != NULL) SDL_FreeSurface(pixtmp); return result; } SDL_Surface *dmCreatePaletteSurfaceFrom(void *data, const int width, const int height, const int pitch) { int yc; Uint8 *dst, *src; SDL_Surface *result; result = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 8, 0,0,0,0); if (result == NULL) return NULL; dst = result->pixels; src = data; for (yc = 0; yc < height; yc++) { memcpy(dst, src, width * sizeof(Uint8)); dst += result->pitch; src += pitch; } return result; } static int dmSTBIread(void *user, char *data, int size) { return dmfread(data, 1, size, (DMResource *) user); } static void dmSTBIskip(void *user, unsigned int n) { dmfseek((DMResource *) user, n, SEEK_CUR); } static int dmSTBIeof(void *user) { return dmfeof((DMResource *) user); } static const stbi_io_callbacks dmSTBICallbacks = { dmSTBIread, dmSTBIskip, dmSTBIeof, }; SDL_Surface *dmLoadImage(DMResource *file) { Uint32 rmask, gmask, bmask, amask; SDL_Surface *result = NULL; int width, height, comp; Uint8 *data; data = stbi_load_from_callbacks(&dmSTBICallbacks, file, &width, &height, &comp, 0); if (data == NULL) { dmError("Error decoding image resource %p '%s' [%d, %d, %d]: %s\n", file, file->filename, width, height, comp, stbi_failure_reason()); return NULL; } #if SDL_BYTEORDER == SDL_BIG_ENDIAN rmask = 0xff000000; gmask = 0x00ff0000; bmask = 0x0000ff00; amask = 0x000000ff; #else rmask = 0x000000ff; gmask = 0x0000ff00; bmask = 0x00ff0000; amask = 0xff000000; #endif switch (comp) { case 4: case 3: result = dmCreateRGBSurfaceFrom(data, width, height, comp * 8, width * comp, rmask, gmask, bmask, amask); break; case 1: result = dmCreatePaletteSurfaceFrom(data, width, height, width * comp); break; } stbi_image_free(data); if (result == NULL) { dmError("Format conversion failed for image resource %p '%s' [%d, %d, %d].\n", file, file->filename, width, height, comp); } return result; }