auto import from //depot/cupcake/@135843

1 files changed, 0 insertions, 275 deletions

diff --git a/loadpng.c b/loadpng.c
deleted file mode 100644
index 218ae20..0000000
--- a/loadpng.c
+++ /dev/null
@@ -1,275 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-
-#include <png.h>
-
-#if 0
-#define LOG(x...) fprintf(stderr,"error: " x)
-#else
-#define LOG(x...) do {} while (0)
-#endif
-
-void *loadpng(const char *fn, unsigned *_width, unsigned *_height)
-{
-    FILE *fp = 0;
-    unsigned char header[8];
-    unsigned char *data = 0;
-    unsigned char **rowptrs = 0;
-    png_structp p = 0;
-    png_infop pi = 0;
-    
-    png_uint_32 width, height;
-    int bitdepth, colortype, imethod, cmethod, fmethod, i;
-
-    p = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
-    if(p == 0) {
-        LOG("%s: failed to allocate png read struct\n", fn);
-        return 0;
-    }
-
-    pi = png_create_info_struct(p);
-    if(pi == 0) {
-        LOG("%s: failed to allocate png info struct\n", fn);
-        goto oops;
-    }
-        
-    fp = fopen(fn, "rb");
-    if(fp == 0) {
-        LOG("%s: failed to open file\n", fn);
-        return 0;
-    }
-
-    if(fread(header, 8, 1, fp) != 1) {
-        LOG("%s: failed to read header\n", fn);
-        goto oops;
-    }
-    
-    if(png_sig_cmp(header, 0, 8)) {
-        LOG("%s: header is not a PNG header\n", fn);
-        goto oops;
-    }
-
-    if(setjmp(png_jmpbuf(p))) {
-        LOG("%s: png library error\n", fn);
-    oops:
-        png_destroy_read_struct(&p, &pi, 0);
-        if(fp != 0) fclose(fp);
-        if(data != 0) free(data);
-        if(rowptrs != 0) free(rowptrs);
-        return 0;
-    }
-
-    png_init_io(p, fp);
-    png_set_sig_bytes(p, 8);
-
-    png_read_info(p, pi);
-
-    png_get_IHDR(p, pi, &width, &height, &bitdepth, &colortype,
-                 &imethod, &cmethod, &fmethod);
-//    printf("PNG: %d x %d (d=%d, c=%d)\n",
-//           width, height, bitdepth, colortype);
-
-    switch(colortype){
-    case PNG_COLOR_TYPE_PALETTE:
-        png_set_palette_to_rgb(p);
-        break;
-
-    case PNG_COLOR_TYPE_RGB:
-        if(png_get_valid(p, pi, PNG_INFO_tRNS)) {
-            png_set_tRNS_to_alpha(p);
-        } else {
-            png_set_filler(p, 0xff, PNG_FILLER_AFTER);
-        }
-        break;
-        
-    case PNG_COLOR_TYPE_RGB_ALPHA:
-        break;
-
-    case PNG_COLOR_TYPE_GRAY:
-        if(bitdepth < 8) {
-            png_set_gray_1_2_4_to_8(p);
-        }
-        
-    default:
-        LOG("%s: unsupported (grayscale?) color type\n");
-        goto oops;
-    }
-
-    if(bitdepth == 16) {
-        png_set_strip_16(p);
-    }
-
-    data = (unsigned char*) malloc((width * 4) * height);
-    rowptrs = (unsigned char **) malloc(sizeof(unsigned char*) * height);
-
-    if((data == 0) || (rowptrs == 0)){
-        LOG("could not allocate data buffer\n");
-        goto oops;
-    }
-
-    for(i = 0; i < height; i++) {
-        rowptrs[i] = data + ((width * 4) * i);
-    }
-    
-    png_read_image(p, rowptrs);
-    
-    png_destroy_read_struct(&p, &pi, 0);
-    fclose(fp);
-    if(rowptrs != 0) free(rowptrs);
-
-    *_width = width;
-    *_height = height;
-    
-    return (void*) data;    
-}
-
-
-typedef struct
-{
-    const unsigned char*  base;
-    const unsigned char*  end;
-    const unsigned char*  cursor;
-
-} PngReader;
-
-static void
-png_reader_read_data( png_structp  png_ptr,
-                      png_bytep   data,
-                      png_size_t  length )
-{
-  PngReader* reader = png_get_io_ptr(png_ptr);
-  png_size_t avail  = (png_size_t)(reader->end - reader->cursor);
-
-  if (avail > length)
-      avail = length;
-
-  memcpy( data, reader->cursor, avail );
-  reader->cursor += avail;
-}
-
-
-void *readpng(const unsigned char *base, size_t   size, unsigned *_width, unsigned *_height)
-{
-    PngReader  reader;
-    unsigned char *data = 0;
-    unsigned char **rowptrs = 0;
-    png_structp p = 0;
-    png_infop pi = 0;
-
-    png_uint_32 width, height;
-    int bitdepth, colortype, imethod, cmethod, fmethod, i;
-
-    p = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
-    if(p == 0) {
-        LOG("%s: failed to allocate png read struct\n", fn);
-        return 0;
-    }
-
-    pi = png_create_info_struct(p);
-    if(pi == 0) {
-        LOG("%s: failed to allocate png info struct\n", fn);
-        goto oops;
-    }
-
-    reader.base   = base;
-    reader.end    = base + size;
-    reader.cursor = base;
-
-    if(size < 8 || png_sig_cmp((unsigned char*)base, 0, 8)) {
-        LOG("%s: header is not a PNG header\n", fn);
-        goto oops;
-    }
-
-    reader.cursor += 8;
-
-    if(setjmp(png_jmpbuf(p))) {
-        LOG("%s: png library error\n", fn);
-    oops:
-        png_destroy_read_struct(&p, &pi, 0);
-        if(data != 0) free(data);
-        if(rowptrs != 0) free(rowptrs);
-        return 0;
-    }
-
-    png_set_read_fn (p, &reader, png_reader_read_data);
-    png_set_sig_bytes(p, 8);
-
-    png_read_info(p, pi);
-
-    png_get_IHDR(p, pi, &width, &height, &bitdepth, &colortype,
-                 &imethod, &cmethod, &fmethod);
-//    printf("PNG: %d x %d (d=%d, c=%d)\n",
-//           width, height, bitdepth, colortype);
-
-    switch(colortype){
-    case PNG_COLOR_TYPE_PALETTE:
-        png_set_palette_to_rgb(p);
-        break;
-
-    case PNG_COLOR_TYPE_RGB:
-        if(png_get_valid(p, pi, PNG_INFO_tRNS)) {
-            png_set_tRNS_to_alpha(p);
-        } else {
-            png_set_filler(p, 0xff, PNG_FILLER_AFTER);
-        }
-        break;
-
-    case PNG_COLOR_TYPE_RGB_ALPHA:
-        break;
-
-    case PNG_COLOR_TYPE_GRAY:
-        if(bitdepth < 8) {
-            png_set_gray_1_2_4_to_8(p);
-        }
-
-    default:
-        LOG("%s: unsupported (grayscale?) color type\n");
-        goto oops;
-    }
-
-    if(bitdepth == 16) {
-        png_set_strip_16(p);
-    }
-
-    data    = (unsigned char*) malloc((width * 4) * height);
-    rowptrs = (unsigned char **) malloc(sizeof(unsigned char*) * height);
-
-    if((data == 0) || (rowptrs == 0)){
-        LOG("could not allocate data buffer\n");
-        goto oops;
-    }
-
-    for(i = 0; i < height; i++) {
-        rowptrs[i] = data + ((width * 4) * i);
-    }
-
-    png_read_image(p, rowptrs);
-
-    png_destroy_read_struct(&p, &pi, 0);
-    if(rowptrs != 0) free(rowptrs);
-
-    *_width = width;
-    *_height = height;
-
-    return (void*) data;    
-}
-
-
-#if 0
-int main(int argc, char **argv)
-{
-    unsigned w,h;
-    unsigned char *data;
-    
-    if(argc < 2) return 0;
-
-
-    data = loadpng(argv[1], &w, &h);
-
-    if(data != 0) {
-        printf("w: %d  h: %d\n", w, h);
-    }
-
-    return 0;
-}
-#endif