forked from len0rd/rockbox
Port of Duke Nukem 3D
This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL for Rockbox. Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9
This commit is contained in:
Franklin Wei
parent
01c6dcf6c7
commit
a855d62025
994 changed files with 336924 additions and 15 deletions
295
apps/plugins/sdl/SDL_image/IMG_webp.c
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295
apps/plugins/sdl/SDL_image/IMG_webp.c
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@ -0,0 +1,295 @@
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/*
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SDL_image: An example image loading library for use with SDL
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Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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/* This is a WEBP image file loading framework */
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#include <stdlib.h>
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#include <stdio.h>
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#include "SDL_image.h"
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#ifdef LOAD_WEBP
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/*=============================================================================
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File: SDL_webp.c
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Purpose: A WEBP loader for the SDL library
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Revision:
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Created by: Michael Bonfils (Murlock) (26 November 2011)
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murlock42@gmail.com
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=============================================================================*/
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#include "SDL_endian.h"
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#ifdef macintosh
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#define MACOS
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#endif
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#include <webp/decode.h>
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static struct {
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int loaded;
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void *handle;
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int/*VP8StatuCode*/ (*webp_get_features_internal) (const uint8_t *data, uint32_t data_size, WebPBitstreamFeatures* const features, int decoder_abi_version);
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uint8_t* (*webp_decode_rgb_into) (const uint8_t* data, uint32_t data_size, uint8_t* output_buffer, int output_buffer_size, int output_stride);
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uint8_t* (*webp_decode_rgba_into) (const uint8_t* data, uint32_t data_size, uint8_t* output_buffer, int output_buffer_size, int output_stride);
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} lib;
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#ifdef LOAD_WEBP_DYNAMIC
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int IMG_InitWEBP()
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{
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if ( lib.loaded == 0 ) {
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lib.handle = SDL_LoadObject(LOAD_WEBP_DYNAMIC);
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if ( lib.handle == NULL ) {
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return -1;
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}
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lib.webp_get_features_internal =
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( int (*) (const uint8_t *, uint32_t, WebPBitstreamFeatures* const, int) )
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SDL_LoadFunction(lib.handle, "WebPGetFeaturesInternal" );
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if ( lib.webp_get_features_internal == NULL ) {
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SDL_UnloadObject(lib.handle);
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return -1;
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}
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lib.webp_decode_rgb_into =
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( uint8_t* (*) (const uint8_t*, uint32_t, uint8_t*, int, int ) )
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SDL_LoadFunction(lib.handle, "WebPDecodeRGBInto" );
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if ( lib.webp_decode_rgb_into == NULL ) {
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SDL_UnloadObject(lib.handle);
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return -1;
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}
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lib.webp_decode_rgba_into =
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( uint8_t* (*) (const uint8_t*, uint32_t, uint8_t*, int, int ) )
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SDL_LoadFunction(lib.handle, "WebPDecodeRGBInto" );
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if ( lib.webp_decode_rgba_into == NULL ) {
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SDL_UnloadObject(lib.handle);
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return -1;
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}
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}
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++lib.loaded;
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return 0;
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}
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void IMG_QuitWEBP()
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{
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if ( lib.loaded == 0 ) {
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return;
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}
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if ( lib.loaded == 1 ) {
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SDL_UnloadObject(lib.handle);
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}
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--lib.loaded;
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}
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#else
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int IMG_InitWEBP()
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{
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if ( lib.loaded == 0 ) {
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lib.webp_get_features_internal = WebPGetFeaturesInternal;
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lib.webp_decode_rgb_into = WebPDecodeRGBInto;
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lib.webp_decode_rgba_into = WebPDecodeRGBAInto;
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}
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++lib.loaded;
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return 0;
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}
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void IMG_QuitWEBP()
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{
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if ( lib.loaded == 0 ) {
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return;
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}
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if ( lib.loaded == 1 ) {
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}
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--lib.loaded;
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}
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#endif /* LOAD_WEBP_DYNAMIC */
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static int webp_getinfo( SDL_RWops *src, int *datasize ) {
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int start;
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int is_WEBP;
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int data;
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Uint8 magic[20];
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if ( !src )
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return 0;
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start = SDL_RWtell(src);
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is_WEBP = 0;
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if ( SDL_RWread(src, magic, 1, sizeof(magic)) == sizeof(magic) ) {
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if ( magic[ 0] == 'R' &&
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magic[ 1] == 'I' &&
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magic[ 2] == 'F' &&
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magic[ 3] == 'F' &&
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magic[ 8] == 'W' &&
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magic[ 9] == 'E' &&
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magic[10] == 'B' &&
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magic[11] == 'P' &&
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magic[12] == 'V' &&
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magic[13] == 'P' &&
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magic[14] == '8' &&
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magic[15] == ' ' ) {
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is_WEBP = 1;
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data = magic[16] | magic[17]<<8 | magic[18]<<16 | magic[19]<<24;
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if ( datasize )
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*datasize = data;
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}
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}
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SDL_RWseek(src, start, RW_SEEK_SET);
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return(is_WEBP);
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}
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/* See if an image is contained in a data source */
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int IMG_isWEBP(SDL_RWops *src)
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{
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return webp_getinfo( src, NULL );
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}
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SDL_Surface *IMG_LoadWEBP_RW(SDL_RWops *src)
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{
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int start;
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const char *error = NULL;
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SDL_Surface *volatile surface = NULL;
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Uint32 Rmask;
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Uint32 Gmask;
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Uint32 Bmask;
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Uint32 Amask;
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WebPBitstreamFeatures features;
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int raw_data_size;
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uint8_t *raw_data;
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int r;
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uint8_t *ret;
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if ( !src ) {
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/* The error message has been set in SDL_RWFromFile */
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return NULL;
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}
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start = SDL_RWtell(src);
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if ( !IMG_Init(IMG_INIT_WEBP) ) {
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goto error;
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}
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raw_data_size = -1;
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if ( !webp_getinfo( src, &raw_data_size ) ) {
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error = "Invalid WEBP";
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goto error;
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}
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// skip header
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SDL_RWseek(src, start+20, RW_SEEK_SET );
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raw_data = (uint8_t*) malloc( raw_data_size );
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if ( raw_data == NULL ) {
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error = "Failed to allocate enought buffer for WEBP";
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goto error;
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}
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r = SDL_RWread(src, raw_data, 1, raw_data_size );
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if ( r != raw_data_size ) {
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error = "Failed to read WEBP";
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goto error;
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}
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#if 0
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// extract size of picture, not interesting since we don't know about alpha channel
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int width = -1, height = -1;
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if ( !WebPGetInfo( raw_data, raw_data_size, &width, &height ) ) {
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printf("WebPGetInfo has failed\n" );
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return NULL;
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}
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#endif
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if ( lib.webp_get_features_internal( raw_data, raw_data_size, &features, WEBP_DECODER_ABI_VERSION ) != VP8_STATUS_OK ) {
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error = "WebPGetFeatures has failed";
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return NULL;
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}
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/* Check if it's ok !*/
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Rmask = 0x000000FF;
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Gmask = 0x0000FF00;
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Bmask = 0x00FF0000;
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Amask = features.has_alpha?0xFF000001:0;
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surface = SDL_AllocSurface(SDL_SWSURFACE, features.width, features.height,
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features.has_alpha?32:24, Rmask,Gmask,Bmask,Amask);
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if ( surface == NULL ) {
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error = "Failed to allocate SDL_Surface";
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goto error;
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}
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if ( features.has_alpha ) {
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ret = lib.webp_decode_rgba_into( raw_data, raw_data_size, surface->pixels, surface->pitch * surface->h, surface->pitch );
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} else {
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ret = lib.webp_decode_rgb_into( raw_data, raw_data_size, surface->pixels, surface->pitch * surface->h, surface->pitch );
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}
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if ( !ret ) {
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error = "Failed to decode WEBP";
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goto error;
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}
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return surface;
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error:
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if ( surface ) {
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SDL_FreeSurface( surface );
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}
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if ( raw_data ) {
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free( raw_data );
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}
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if ( error ) {
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IMG_SetError( error );
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}
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SDL_RWseek(src, start, RW_SEEK_SET);
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return(NULL);
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}
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#else
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int IMG_InitWEBP()
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{
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IMG_SetError("WEBP images are not supported");
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return(-1);
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}
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void IMG_QuitWEBP()
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{
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}
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/* See if an image is contained in a data source */
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int IMG_isWEBP(SDL_RWops *src)
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{
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return(0);
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}
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/* Load a WEBP type image from an SDL datasource */
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SDL_Surface *IMG_LoadWEBP_RW(SDL_RWops *src)
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{
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return(NULL);
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}
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#endif /* LOAD_WEBP */
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