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animated texture

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This commit is contained in:
Eduardo Bart
2011-05-12 20:24:57 -03:00
parent c6753747fb
commit 42eae9afd8
32 changed files with 289 additions and 146 deletions
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120
src/framework/graphics/textureloader.cpp
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@@ -25,116 +25,22 @@
#include <prerequisites.h>
#include <graphics/textureloader.h>
#include <graphics/texture.h>
#include <util/apngloader.h>
#include "animatedtexture.h"
#include <png.h>
struct File
TexturePtr TextureLoader::loadPNG(uchar *fileData, uint fileSize)
{
File() {
offset = 0;
TexturePtr texture;
apng_data apng;
if(load_apng(fileData, fileSize, &apng) == 0) {
if(apng.num_frames > 1) { // animated texture
uchar *framesdata = apng.pdata + (apng.first_frame * apng.width * apng.height * apng.bpp);
texture = TexturePtr(new AnimatedTexture(apng.width, apng.height, apng.bpp, apng.num_frames, framesdata, (int*)apng.frames_delay));
} else
texture = TexturePtr(new Texture(apng.width, apng.height, apng.bpp, apng.pdata));
free_apng(&apng);
}
uchar *data;
uint offset;
};
void png_read_from_mem(png_structp png_ptr, png_bytep data, png_size_t size)
{
File *file = (File*)png_get_io_ptr(png_ptr);
/* Copy data from image buffer */
memcpy(data, file->data + file->offset, size);
/* Advance in the file */
file->offset += size;
}
Texture *TextureLoader::loadPNG(uchar *fileData)
{
File file;
file.data = fileData;
if(png_sig_cmp(file.data, 0, 8))
return NULL;
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if(!png_ptr)
return NULL;
png_infop info_ptr = png_create_info_struct(png_ptr);
if(!info_ptr) {
png_destroy_read_struct(&png_ptr, NULL, NULL);
return NULL;
}
if(setjmp(png_jmpbuf(png_ptr))) {
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return NULL;
}
// Set "png_read" callback function and give source of data
png_set_read_fn(png_ptr, (png_voidp *)&file, png_read_from_mem);
png_read_info(png_ptr, info_ptr);
int bitDepth = png_get_bit_depth(png_ptr, info_ptr);
int colourType = png_get_color_type(png_ptr, info_ptr);
if(colourType == PNG_COLOR_TYPE_PALETTE)
png_set_palette_to_rgb(png_ptr);
if(bitDepth < 8 && (colourType == PNG_COLOR_TYPE_GRAY || colourType == PNG_COLOR_TYPE_GRAY_ALPHA))
png_set_expand_gray_1_2_4_to_8(png_ptr);
if(png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
png_set_tRNS_to_alpha(png_ptr);
if(bitDepth < 8)
png_set_packing(png_ptr);
else if(bitDepth == 16)
png_set_strip_16(png_ptr);
png_read_update_info(png_ptr, info_ptr);
png_uint_32 width, height;
png_get_IHDR(png_ptr, info_ptr, &width, &height, &bitDepth, &colourType, NULL, NULL, NULL);
int components;
switch(colourType)
{
case PNG_COLOR_TYPE_GRAY:
components = 1;
break;
case PNG_COLOR_TYPE_GRAY_ALPHA:
components = 2;
break;
case PNG_COLOR_TYPE_RGB:
components = 3;
break;
case PNG_COLOR_TYPE_RGB_ALPHA:
components = 4;
break;
default:
if(png_ptr)
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return NULL;
};
uchar *pixels = new uchar[width * height * components];
png_bytep *row_pointers = new png_bytep[height];
for(uint i = 0; i < height; ++i)
row_pointers[i] = (png_bytep)(pixels + (i * width * components));
png_read_image(png_ptr, row_pointers);
png_read_end(png_ptr, NULL);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
delete[] row_pointers;
Texture *texture = new Texture(width, height, components, pixels);
delete[] pixels;
return texture;
}