mirror of
https://github.com/GRRLIB/GRRLIB.git
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113 lines
3.5 KiB
C
113 lines
3.5 KiB
C
/*------------------------------------------------------------------------------
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Copyright (c) 2012 The GRRLIB Team
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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------------------------------------------------------------------------------*/
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#include <grrlib.h>
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#include <stdio.h>
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#include <pngu.h>
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/**
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* Load a file to memory.
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* @param filename Name of the file to be loaded.
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* @param data Pointer-to-your-pointer.
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* Ie. { u8 *data; GRRLIB_LoadFile("file", &data); }.
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* It is your responsibility to free the memory allocated by this function.
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* @return A integer representing a code:
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* - 0 : EmptyFile.
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* - -1 : FileNotFound.
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* - -2 : OutOfMemory.
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* - -3 : FileReadError.
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* - >0 : FileLength.
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*/
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int GRRLIB_LoadFile(const char* filename, unsigned char* *data) {
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int len;
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FILE *fd;
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// Open the file
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if ( !(fd = fopen(filename, "rb")) ) {
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return -1;
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}
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// Get file length
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fseek(fd, 0, SEEK_END);
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if ( !(len = ftell(fd)) ) {
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fclose(fd);
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*data = NULL;
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return 0;
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}
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fseek(fd, 0, SEEK_SET);
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// Grab some memory in which to store the file
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if ( !(*data = malloc(len)) ) {
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fclose(fd);
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return -2;
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}
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if ( fread(*data, 1, len, fd) != len) {
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fclose(fd);
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free(*data); *data = NULL;
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return -3;
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}
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fclose(fd);
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return len;
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}
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/**
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* Load a texture from a file.
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* @param filename The JPEG, PNG or Bitmap filename to load.
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* @return A GRRLIB_texImg structure filled with image information.
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* If an error occurs NULL will be returned.
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*/
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GRRLIB_texImg* GRRLIB_LoadTextureFromFile(const char *filename) {
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GRRLIB_texImg *tex;
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unsigned char *data;
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// return NULL it load fails
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if (GRRLIB_LoadFile(filename, &data) <= 0) return NULL;
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// Convert to texture
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tex = GRRLIB_LoadTexture(data);
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// Free up the buffer
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free(data);
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return tex;
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}
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/**
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* Make a PNG screenshot.
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* It should be called after drawing stuff on the screen, but before GRRLIB_Render.
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* libfat is required to use the function.
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* @param filename Name of the file to write.
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* @return bool true=everything worked, false=problems occurred.
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*/
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bool GRRLIB_ScrShot(const char* filename) {
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IMGCTX pngContext;
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int ret = -1;
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if ( (pngContext = PNGU_SelectImageFromDevice(filename)) ) {
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ret = PNGU_EncodeFromEFB( pngContext,
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rmode->fbWidth, rmode->efbHeight,
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0 );
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PNGU_ReleaseImageContext(pngContext);
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}
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return !ret;
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}
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