diff options
Diffstat (limited to 'libdimension-png')
| -rw-r--r-- | libdimension-png/png.c | 42 |
1 files changed, 16 insertions, 26 deletions
diff --git a/libdimension-png/png.c b/libdimension-png/png.c index 49f1d6c..1c12dcf 100644 --- a/libdimension-png/png.c +++ b/libdimension-png/png.c @@ -32,7 +32,7 @@ dmnsn_png_write_canvas(const dmnsn_canvas *canvas, FILE *file) png_uint_32 width, height; unsigned int x, y; uint16_t *row = NULL; - dmnsn_color *pixel; + dmnsn_color color; dmnsn_sRGB sRGB; width = canvas->x; @@ -80,8 +80,8 @@ dmnsn_png_write_canvas(const dmnsn_canvas *canvas, FILE *file) for (y = 0; y < height; ++y) { for (x = 0; x < width; ++x) { /* Invert the rows. PNG coordinates are fourth quadrant. */ - pixel = canvas->pixels + (height - y - 1)*width + x; - sRGB = dmnsn_sRGB_from_color(*pixel); + color = dmnsn_get_pixel(canvas, x, height - y - 1); + sRGB = dmnsn_sRGB_from_color(color); if (sRGB.R <= 0.0) { row[4*x] = 0; @@ -107,7 +107,7 @@ dmnsn_png_write_canvas(const dmnsn_canvas *canvas, FILE *file) row[4*x + 2] = sRGB.B*UINT16_MAX; } - row[4*x + 3] = (pixel->filter + pixel->trans)*UINT16_MAX; + row[4*x + 3] = (color.filter + color.trans)*UINT16_MAX; } png_write_row(png_ptr, (png_bytep)row); } @@ -130,7 +130,7 @@ dmnsn_png_read_canvas(dmnsn_canvas **canvas, FILE *file) png_bytep image = NULL; png_bytep *row_pointers = NULL; unsigned int x, y; - dmnsn_color *pixel; + dmnsn_color color; dmnsn_sRGB sRGB; png_bytep png_pixel; @@ -219,7 +219,6 @@ dmnsn_png_read_canvas(dmnsn_canvas **canvas, FILE *file) if (color_type & PNG_COLOR_MASK_ALPHA) { for (x = 0; x < width; ++x) { for (y = 0; y < height; ++y) { - pixel = (*canvas)->pixels + (height - y - 1)*width + x; png_pixel = image + 8*(y*width + x); sRGB.R = ((double)((png_pixel[0] << UINT16_C(8)) + png_pixel[1])) @@ -229,17 +228,15 @@ dmnsn_png_read_canvas(dmnsn_canvas **canvas, FILE *file) sRGB.B = ((double)((png_pixel[4] << UINT16_C(8)) + png_pixel[5])) /UINT16_MAX; - *pixel = dmnsn_color_from_sRGB(sRGB); - - pixel->filter = 0.0; - pixel->trans = ((double)((png_pixel[6] << UINT16_C(8)) - + png_pixel[7]))/UINT16_MAX; + color = dmnsn_color_from_sRGB(sRGB); + color.trans = ((double)((png_pixel[6] << UINT16_C(8)) + + png_pixel[7]))/UINT16_MAX; + dmnsn_set_pixel(*canvas, color, x, height - y - 1); } } } else { for (x = 0; x < width; ++x) { for (y = 0; y < height; ++y) { - pixel = (*canvas)->pixels + (height - y - 1)*width + x; png_pixel = image + 6*(y*width + x); sRGB.R = ((double)((png_pixel[0] << UINT16_C(8)) + png_pixel[1])) @@ -249,10 +246,8 @@ dmnsn_png_read_canvas(dmnsn_canvas **canvas, FILE *file) sRGB.B = ((double)((png_pixel[4] << UINT16_C(8)) + png_pixel[5])) /UINT16_MAX; - *pixel = dmnsn_color_from_sRGB(sRGB); - - pixel->filter = 0.0; - pixel->trans = 0.0; + color = dmnsn_color_from_sRGB(sRGB); + dmnsn_set_pixel(*canvas, color, x, height - y - 1); } } } @@ -261,33 +256,28 @@ dmnsn_png_read_canvas(dmnsn_canvas **canvas, FILE *file) if (color_type & PNG_COLOR_MASK_ALPHA) { for (x = 0; x < width; ++x) { for (y = 0; y < height; ++y) { - pixel = (*canvas)->pixels + (height - y - 1)*width + x; png_pixel = image + 4*(y*width + x); sRGB.R = ((double)png_pixel[0])/UINT8_MAX; sRGB.G = ((double)png_pixel[1])/UINT8_MAX; sRGB.B = ((double)png_pixel[2])/UINT8_MAX; - *pixel = dmnsn_color_from_sRGB(sRGB); - - pixel->filter = 0.0; - pixel->trans = ((double)png_pixel[3])/UINT8_MAX; + color = dmnsn_color_from_sRGB(sRGB); + color.trans = ((double)png_pixel[3])/UINT8_MAX; + dmnsn_set_pixel(*canvas, color, x, height - y - 1); } } } else { for (x = 0; x < width; ++x) { for (y = 0; y < height; ++y) { - pixel = (*canvas)->pixels + (height - y - 1)*width + x; png_pixel = image + 3*(y*width + x); sRGB.R = ((double)png_pixel[0])/UINT8_MAX; sRGB.G = ((double)png_pixel[1])/UINT8_MAX; sRGB.B = ((double)png_pixel[2])/UINT8_MAX; - *pixel = dmnsn_color_from_sRGB(sRGB); - - pixel->filter = 0.0; - pixel->trans = 0.0; + color = dmnsn_color_from_sRGB(sRGB); + dmnsn_set_pixel(*canvas, color, x, height - y - 1); } } } |