Mercurial > hg > dmlib
view src/dmimage.c @ 2208:90ec1ec89c56
Revamp the palette handling in lib64gfx somewhat, add helper functions to
lib64util for handling external palette file options and add support for
specifying one of the "internal" palettes or external (.act) palette file to
gfxconv and 64vw.
author | Matti Hamalainen <ccr@tnsp.org> |
---|---|
date | Fri, 14 Jun 2019 05:01:12 +0300 |
parents | 7a2337dcd1b3 |
children | 0e355702435d |
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/* * DMLib * -- Bitmap image conversion and loading * Programmed and designed by Matti 'ccr' Hamalainen * (C) Copyright 2012-2015 Tecnic Software productions (TNSP) */ #include "dmimage.h" #include "dmzlib.h" // Formats #define STBI_ONLY_JPEG 1 #define STBI_ONLY_PNG 1 //#define STBI_NO_HDR 1 // Other options, etc. #ifndef DM_DEBUG #define STBI_NO_FAILURE_STRINGS 1 #define STBI_ASSERT(x) #endif #define STBI_FAILURE_USERMSG 1 #define STB_IMAGE_IMPLEMENTATION 1 #define STBI_NO_STDIO 1 #include "stb_image.c" SDL_Surface *dmCreateRGBSurfaceFrom(void *data, const int width, const int height, const int depth, const int pitch, const Uint32 format) { // Create source surface from given data SDL_Surface *result = NULL, *tmp = SDL_CreateRGBSurfaceWithFormatFrom(data, width, height, depth, pitch, format); // Create result conversion surface if (tmp != NULL) { result = SDL_ConvertSurfaceFormat(tmp, SDL_PIXELFORMAT_RGBA32, 0); SDL_FreeSurface(tmp); } 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_CreateRGBSurfaceWithFormat(0, width, height, 8, SDL_PIXELFORMAT_INDEX8); 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, 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) { SDL_Surface *result = NULL; int width = 0, height = 0, comp = 0; Uint8 *data; dmfreset(file); data = stbi_load_from_callbacks(&dmSTBICallbacks, file, &width, &height, &comp, 0); if (data == NULL) { dmErrorDBGMsg( "Error decoding image resource %p '%s' [%d, %d, %d]: %s\n", file, file->filename, width, height, comp, stbi_failure_reason()); return NULL; } switch (comp) { case 4: result = dmCreateRGBSurfaceFrom(data, width, height, comp * 8, width * comp, #if SDL_BYTEORDER == SDL_BIG_ENDIAN SDL_PIXELFORMAT_ABGR8888 #else SDL_PIXELFORMAT_ARGB8888 #endif ); break; case 3: // These masks are different from the dmX*masks result = dmCreateRGBSurfaceFrom(data, width, height, comp * 8, width * comp, #if SDL_BYTEORDER == SDL_BIG_ENDIAN SDL_PIXELFORMAT_BGR888 #else SDL_PIXELFORMAT_RGB888 #endif ); break; case 1: result = dmCreatePaletteSurfaceFrom(data, width, height, width * comp); break; } stbi_image_free(data); if (result == NULL) { dmErrorDBGMsg( "Format conversion failed for image resource %p '%s' [%d, %d, %d].\n", file, file->filename, width, height, comp); } return result; } SDL_Texture *dmLoadImageToTexture(DMResource *file, SDL_Renderer *renderer) { SDL_Surface *tmp; SDL_Texture *texture; // Sanity checks if (renderer == NULL || file == NULL) return NULL; if ((tmp = dmLoadImage(file)) == NULL) return NULL; // Attempt to create the texture texture = SDL_CreateTextureFromSurface(renderer, tmp); SDL_FreeSurface(tmp); return texture; }