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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,113 +1,109 @@ | ||
| /* | ||
| LodePNG Examples | ||
| Copyright (c) 2005-2012 Lode Vandevenne | ||
| This software is provided 'as-is', without any express or implied | ||
| warranty. In no event will the authors be held liable for any damages | ||
| arising from the use of this software. | ||
| Permission is granted to anyone to use this software for any purpose, | ||
| including commercial applications, and to alter it and redistribute it | ||
| freely, subject to the following restrictions: | ||
| 1. The origin of this software must not be misrepresented; you must not | ||
| claim that you wrote the original software. If you use this software | ||
| in a product, an acknowledgment in the product documentation would be | ||
| appreciated but is not required. | ||
| 2. Altered source versions must be plainly marked as such, and must not be | ||
| misrepresented as being the original software. | ||
| 3. This notice may not be removed or altered from any source | ||
| distribution. | ||
| */ | ||
|
|
||
| #include "lodepng.h" | ||
|
|
||
| #include <stdio.h> | ||
| #include <stdlib.h> | ||
|
|
||
| /* | ||
| 3 ways to decode a PNG from a file to RGBA pixel data (and 2 in-memory ways). | ||
| */ | ||
|
|
||
| /* | ||
| Example 1 | ||
| Decode from disk to raw pixels with a single function call | ||
| */ | ||
| void decodeOneStep(const char* filename) | ||
| { | ||
| unsigned error; | ||
| unsigned char* image; | ||
| unsigned width, height; | ||
|
|
||
| error = lodepng_decode32_file(&image, &width, &height, filename); | ||
| if(error) printf("error %u: %s\n", error, lodepng_error_text(error)); | ||
|
|
||
| /*use image here*/ | ||
|
|
||
| free(image); | ||
| } | ||
|
|
||
| /* | ||
| Example 2 | ||
| Load PNG file from disk to memory first, then decode to raw pixels in memory. | ||
| */ | ||
| void decodeTwoSteps(const char* filename) | ||
| { | ||
| unsigned error; | ||
| unsigned char* image; | ||
| unsigned width, height; | ||
| unsigned char* png = 0; | ||
| size_t pngsize; | ||
|
|
||
| error = lodepng_load_file(&png, &pngsize, filename); | ||
| if(!error) error = lodepng_decode32(&image, &width, &height, png, pngsize); | ||
| if(error) printf("error %u: %s\n", error, lodepng_error_text(error)); | ||
|
|
||
| free(png); | ||
|
|
||
| /*use image here*/ | ||
|
|
||
| free(image); | ||
| } | ||
|
|
||
| /* | ||
| Example 3 | ||
| Load PNG file from disk using a State, normally needed for more advanced usage. | ||
| */ | ||
| void decodeWithState(const char* filename) | ||
| { | ||
| unsigned error; | ||
| unsigned char* image; | ||
| unsigned width, height; | ||
| unsigned char* png = 0; | ||
| size_t pngsize; | ||
| LodePNGState state; | ||
|
|
||
| lodepng_state_init(&state); | ||
| /*optionally customize the state*/ | ||
|
|
||
| error = lodepng_load_file(&png, &pngsize, filename); | ||
| if(!error) error = lodepng_decode(&image, &width, &height, &state, png, pngsize); | ||
| if(error) printf("error %u: %s\n", error, lodepng_error_text(error)); | ||
|
|
||
| free(png); | ||
|
|
||
| /*use image here*/ | ||
| /*state contains extra information about the PNG such as text chunks, ...*/ | ||
|
|
||
| lodepng_state_cleanup(&state); | ||
| free(image); | ||
| } | ||
|
|
||
| int main(int argc, char *argv[]) | ||
| { | ||
| const char* filename = argc > 1 ? argv[1] : "test.png"; | ||
|
|
||
| decodeOneStep(filename); | ||
|
|
||
| return 0; | ||
| } | ||
|
|
||
| /* | ||
| LodePNG Examples | ||
| Copyright (c) 2005-2012 Lode Vandevenne | ||
| This software is provided 'as-is', without any express or implied | ||
| warranty. In no event will the authors be held liable for any damages | ||
| arising from the use of this software. | ||
| Permission is granted to anyone to use this software for any purpose, | ||
| including commercial applications, and to alter it and redistribute it | ||
| freely, subject to the following restrictions: | ||
| 1. The origin of this software must not be misrepresented; you must not | ||
| claim that you wrote the original software. If you use this software | ||
| in a product, an acknowledgment in the product documentation would be | ||
| appreciated but is not required. | ||
| 2. Altered source versions must be plainly marked as such, and must not be | ||
| misrepresented as being the original software. | ||
| 3. This notice may not be removed or altered from any source | ||
| distribution. | ||
| */ | ||
|
|
||
| #include "lodepng.h" | ||
|
|
||
| #include <stdio.h> | ||
| #include <stdlib.h> | ||
|
|
||
| /* | ||
| 3 ways to decode a PNG from a file to RGBA pixel data (and 2 in-memory ways). | ||
| */ | ||
|
|
||
| /* | ||
| Example 1 | ||
| Decode from disk to raw pixels with a single function call | ||
| */ | ||
| void decodeOneStep(const char* filename) { | ||
| unsigned error; | ||
| unsigned char* image; | ||
| unsigned width, height; | ||
|
|
||
| error = lodepng_decode32_file(&image, &width, &height, filename); | ||
| if(error) printf("error %u: %s\n", error, lodepng_error_text(error)); | ||
|
|
||
| /*use image here*/ | ||
|
|
||
| free(image); | ||
| } | ||
|
|
||
| /* | ||
| Example 2 | ||
| Load PNG file from disk to memory first, then decode to raw pixels in memory. | ||
| */ | ||
| void decodeTwoSteps(const char* filename) { | ||
| unsigned error; | ||
| unsigned char* image; | ||
| unsigned width, height; | ||
| unsigned char* png = 0; | ||
| size_t pngsize; | ||
|
|
||
| error = lodepng_load_file(&png, &pngsize, filename); | ||
| if(!error) error = lodepng_decode32(&image, &width, &height, png, pngsize); | ||
| if(error) printf("error %u: %s\n", error, lodepng_error_text(error)); | ||
|
|
||
| free(png); | ||
|
|
||
| /*use image here*/ | ||
|
|
||
| free(image); | ||
| } | ||
|
|
||
| /* | ||
| Example 3 | ||
| Load PNG file from disk using a State, normally needed for more advanced usage. | ||
| */ | ||
| void decodeWithState(const char* filename) { | ||
| unsigned error; | ||
| unsigned char* image; | ||
| unsigned width, height; | ||
| unsigned char* png = 0; | ||
| size_t pngsize; | ||
| LodePNGState state; | ||
|
|
||
| lodepng_state_init(&state); | ||
| /*optionally customize the state*/ | ||
|
|
||
| error = lodepng_load_file(&png, &pngsize, filename); | ||
| if(!error) error = lodepng_decode(&image, &width, &height, &state, png, pngsize); | ||
| if(error) printf("error %u: %s\n", error, lodepng_error_text(error)); | ||
|
|
||
| free(png); | ||
|
|
||
| /*use image here*/ | ||
| /*state contains extra information about the PNG such as text chunks, ...*/ | ||
|
|
||
| lodepng_state_cleanup(&state); | ||
| free(image); | ||
| } | ||
|
|
||
| int main(int argc, char *argv[]) { | ||
| const char* filename = argc > 1 ? argv[1] : "test.png"; | ||
|
|
||
| decodeOneStep(filename); | ||
|
|
||
| return 0; | ||
| } | ||
|
|
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