/**************************************************************************
*
+ * Copyright 2011 Jose Fonseca
* Copyright 2008-2010 VMware, Inc.
* All Rights Reserved.
*
**************************************************************************/
-#include <zlib.h>
-#include <png.h>
-
+#include <assert.h>
#include <math.h>
-#include <stdint.h>
-#include <stdlib.h>
-
-#include <fstream>
#include "image.hpp"
namespace Image {
-#pragma pack(push,2)
-struct FileHeader {
- uint16_t bfType;
- uint32_t bfSize;
- uint16_t bfReserved1;
- uint16_t bfReserved2;
- uint32_t bfOffBits;
-};
-#pragma pack(pop)
-
-struct InfoHeader {
- uint32_t biSize;
- int32_t biWidth;
- int32_t biHeight;
- uint16_t biPlanes;
- uint16_t biBitCount;
- uint32_t biCompression;
- uint32_t biSizeImage;
- int32_t biXPelsPerMeter;
- int32_t biYPelsPerMeter;
- uint32_t biClrUsed;
- uint32_t biClrImportant;
-};
-
-struct Pixel {
- uint8_t rgbBlue;
- uint8_t rgbGreen;
- uint8_t rgbRed;
- uint8_t rgbAlpha;
-};
-
-
-bool
-Image::writeBMP(const char *filename) const {
- struct FileHeader bmfh;
- struct InfoHeader bmih;
- unsigned x, y;
-
- bmfh.bfType = 0x4d42;
- bmfh.bfSize = 14 + 40 + height*width*4;
- bmfh.bfReserved1 = 0;
- bmfh.bfReserved2 = 0;
- bmfh.bfOffBits = 14 + 40;
-
- bmih.biSize = 40;
- bmih.biWidth = width;
- bmih.biHeight = height;
- bmih.biPlanes = 1;
- bmih.biBitCount = 32;
- bmih.biCompression = 0;
- bmih.biSizeImage = height*width*4;
- bmih.biXPelsPerMeter = 0;
- bmih.biYPelsPerMeter = 0;
- bmih.biClrUsed = 0;
- bmih.biClrImportant = 0;
-
- std::ofstream stream(filename, std::ofstream::binary);
-
- if (!stream)
- return false;
-
- stream.write((const char *)&bmfh, 14);
- stream.write((const char *)&bmih, 40);
-
- unsigned stride = width*4;
-
- if (flipped) {
- for (y = 0; y < height; ++y) {
- const unsigned char *ptr = pixels + y * stride;
- for (x = 0; x < width; ++x) {
- struct Pixel pixel;
- pixel.rgbRed = ptr[x*4 + 0];
- pixel.rgbGreen = ptr[x*4 + 1];
- pixel.rgbBlue = ptr[x*4 + 2];
- pixel.rgbAlpha = ptr[x*4 + 3];
- stream.write((const char *)&pixel, 4);
- }
- }
- } else {
- y = height;
- while (y--) {
- const unsigned char *ptr = pixels + y * stride;
- for (x = 0; x < width; ++x) {
- struct Pixel pixel;
- pixel.rgbRed = ptr[x*4 + 0];
- pixel.rgbGreen = ptr[x*4 + 1];
- pixel.rgbBlue = ptr[x*4 + 2];
- pixel.rgbAlpha = ptr[x*4 + 3];
- stream.write((const char *)&pixel, 4);
- }
- }
- }
-
- stream.close();
-
- return true;
-}
-
-bool
-Image::writePNG(const char *filename) const {
- FILE *fp;
- png_structp png_ptr;
- png_infop info_ptr;
-
- fp = fopen(filename, "wb");
- if (!fp)
- goto no_fp;
-
- png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
- if (!png_ptr)
- goto no_png;
-
- info_ptr = png_create_info_struct(png_ptr);
- if (!info_ptr) {
- png_destroy_write_struct(&png_ptr, NULL);
- goto no_png;
- }
-
- if (setjmp(png_jmpbuf(png_ptr))) {
- png_destroy_write_struct(&png_ptr, &info_ptr);
- goto no_png;
- }
-
- png_init_io(png_ptr, fp);
-
- png_set_IHDR(png_ptr, info_ptr, width, height, 8, PNG_COLOR_TYPE_RGB_ALPHA,
- PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
-
- png_set_compression_level(png_ptr, Z_DEFAULT_COMPRESSION);
-
- png_write_info(png_ptr, info_ptr);
-
- if (!flipped) {
- for (unsigned y = 0; y < height; ++y) {
- png_bytep row = (png_bytep)(pixels + y*width*4);
- png_write_rows(png_ptr, &row, 1);
- }
- } else {
- unsigned y = height;
- while (y--) {
- png_bytep row = (png_bytep)(pixels + y*width*4);
- png_write_rows(png_ptr, &row, 1);
- }
- }
-
- png_write_end(png_ptr, info_ptr);
- png_destroy_write_struct(&png_ptr, &info_ptr);
-
- fclose(fp);
- return true;
-
-no_png:
- fclose(fp);
-no_fp:
- return false;
-}
-
-
-Image *
-readPNG(const char *filename)
-{
- FILE *fp;
- png_structp png_ptr;
- png_infop info_ptr;
- png_infop end_info;
- Image *image;
-
- fp = fopen(filename, "rb");
- if (!fp)
- goto no_fp;
-
- png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
- if (!png_ptr)
- goto no_png;
-
- info_ptr = png_create_info_struct(png_ptr);
- if (!info_ptr) {
- png_destroy_read_struct(&png_ptr, NULL, NULL);
- goto no_png;
- }
-
- end_info = png_create_info_struct(png_ptr);
- if (!end_info) {
- png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
- goto no_png;
- }
-
- if (setjmp(png_jmpbuf(png_ptr))) {
- png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
- goto no_png;
- }
-
- png_init_io(png_ptr, fp);
-
- png_read_info(png_ptr, info_ptr);
-
- png_uint_32 width, height;
- int bit_depth, color_type, interlace_type, compression_type, filter_method;
-
- png_get_IHDR(png_ptr, info_ptr,
- &width, &height,
- &bit_depth, &color_type, &interlace_type,
- &compression_type, &filter_method);
-
- image = new Image(width, height);
- if (!image)
- goto no_image;
-
- /* Convert to RGBA8 */
- if (color_type == PNG_COLOR_TYPE_PALETTE)
- png_set_palette_to_rgb(png_ptr);
- if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
- 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 (bit_depth == 16)
- png_set_strip_16(png_ptr);
-
- for (unsigned y = 0; y < height; ++y) {
- png_bytep row = (png_bytep)(image->pixels + y*width*4);
- png_read_row(png_ptr, row, NULL);
- }
-
- png_read_end(png_ptr, info_ptr);
- png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
- fclose(fp);
- return image;
-
-no_image:
- png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
-no_png:
- fclose(fp);
-no_fp:
- return NULL;
-}
-
-
double Image::compare(Image &ref)
{
if (width != ref.width ||
- height != ref.height) {
+ height != ref.height ||
+ channels != ref.channels) {
return 0.0;
}
const unsigned char *pSrc = start();
const unsigned char *pRef = ref.start();
+ assert(channels >= 3);
+
unsigned long long error = 0;
for (unsigned y = 0; y < height; ++y) {
for (unsigned x = 0; x < width; ++x) {
// FIXME: Ignore alpha channel until we are able to pick a visual
// that matches the traces
for (unsigned c = 0; c < 3; ++c) {
- int delta = pSrc[x*4 + c] - pRef[x*4 + c];
+ int delta = pSrc[x*channels + c] - pRef[x*channels + c];
error += delta*delta;
}
}
return precision;
}
-struct png_tmp_buffer
-{
- char *buffer;
- size_t size;
-};
-
-static void
-pngWriteCallback(png_structp png_ptr, png_bytep data, png_size_t length)
-{
- struct png_tmp_buffer *buf = (struct png_tmp_buffer*) png_get_io_ptr(png_ptr);
- size_t nsize = buf->size + length;
-
- /* allocate or grow buffer */
- if (buf->buffer)
- buf->buffer = (char*)realloc(buf->buffer, nsize);
- else
- buf->buffer = (char*)malloc(nsize);
-
- if (!buf->buffer)
- png_error(png_ptr, "Buffer allocation error");
-
- memcpy(buf->buffer + buf->size, data, length);
- buf->size += length;
-}
-
-bool writePixelsToBuffer(unsigned char *pixels,
- unsigned width, unsigned height, unsigned numChannels,
- bool flipped,
- char **buffer,
- int *size)
-{
- struct png_tmp_buffer png_mem;
- png_structp png_ptr;
- png_infop info_ptr;
- int type;
-
- png_mem.buffer = NULL;
- png_mem.size = 0;
-
- switch (numChannels) {
- case 4:
- type = PNG_COLOR_TYPE_RGB_ALPHA;
- break;
- case 3:
- type = PNG_COLOR_TYPE_RGB;
- break;
- case 2:
- type = PNG_COLOR_TYPE_GRAY_ALPHA;
- break;
- case 1:
- type = PNG_COLOR_TYPE_GRAY;
- break;
- default:
- goto no_png;
- }
-
- png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
- if (!png_ptr)
- goto no_png;
-
- info_ptr = png_create_info_struct(png_ptr);
- if (!info_ptr) {
- png_destroy_write_struct(&png_ptr, NULL);
- goto no_png;
- }
-
- if (setjmp(png_jmpbuf(png_ptr))) {
- png_destroy_write_struct(&png_ptr, &info_ptr);
- goto no_png;
- }
-
- png_set_write_fn(png_ptr, &png_mem, pngWriteCallback, NULL);
-
- png_set_IHDR(png_ptr, info_ptr, width, height, 8,
- type, PNG_INTERLACE_NONE,
- PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
-
- png_set_compression_level(png_ptr, Z_DEFAULT_COMPRESSION);
-
- png_write_info(png_ptr, info_ptr);
-
- if (!flipped) {
- for (unsigned y = 0; y < height; ++y) {
- png_bytep row = (png_bytep)(pixels + y*width*numChannels);
- png_write_rows(png_ptr, &row, 1);
- }
- } else {
- unsigned y = height;
- while (y--) {
- png_bytep row = (png_bytep)(pixels + y*width*numChannels);
- png_write_rows(png_ptr, &row, 1);
- }
- }
-
- png_write_end(png_ptr, info_ptr);
- png_destroy_write_struct(&png_ptr, &info_ptr);
-
- *buffer = png_mem.buffer;
- *size = png_mem.size;
-
- return true;
-
-no_png:
- *buffer = NULL;
- *size = 0;
-
- if (png_mem.buffer)
- free(png_mem.buffer);
- return false;
-}
} /* namespace Image */
projects / apitrace / blobdiff