is a library for the dynamic creation of images by programmers (PNG, JPEG, GIF, WebP, XPM, BMP support).
| gd_filter.c (libgd-2.2.4) | : | gd_filter.c (libgd-2.2.5) |
|---|
| | |
| skipping to change at line 238 | | skipping to change at line 238 |
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| } | | } |
| } | | } |
| return 1; | | return 1; |
| } | | } |
| | |
| /** | | /** |
| * Function: gdImageGrayScale | | * Function: gdImageGrayScale |
| * | | * |
| * Convert an image to grayscale | | * Convert an image to grayscale |
| * | | * |
|
| | * The red, green and blue components of each pixel are replaced by their |
| | * weighted sum using the same coefficients as the REC.601 luma (Y') |
| | * calculation. The alpha components are retained. |
| | * |
| | * For palette images the result may differ due to palette limitations. |
| | * |
| * Parameters: | | * Parameters: |
| * src - The image. | | * src - The image. |
| * | | * |
| * Returns: | | * Returns: |
| * Non-zero on success, zero on failure. | | * Non-zero on success, zero on failure. |
| */ | | */ |
| BGD_DECLARE(int) gdImageGrayScale(gdImagePtr src) | | BGD_DECLARE(int) gdImageGrayScale(gdImagePtr src) |
| { | | { |
| int x, y; | | int x, y; |
| int r,g,b,a; | | int r,g,b,a; |
| int new_pxl, pxl; | | int new_pxl, pxl; |
| FuncPtr f; | | FuncPtr f; |
|
| | int alpha_blending; |
| | |
| if (src==NULL) { | | if (src==NULL) { |
| return 0; | | return 0; |
| } | | } |
| | |
|
| | alpha_blending = src->alphaBlendingFlag; |
| | gdImageAlphaBlending(src, gdEffectReplace); |
| | |
| f = GET_PIXEL_FUNCTION(src); | | f = GET_PIXEL_FUNCTION(src); |
| | |
| for (y=0; y<src->sy; ++y) { | | for (y=0; y<src->sy; ++y) { |
| for (x=0; x<src->sx; ++x) { | | for (x=0; x<src->sx; ++x) { |
| pxl = f (src, x, y); | | pxl = f (src, x, y); |
| r = gdImageRed(src, pxl); | | r = gdImageRed(src, pxl); |
| g = gdImageGreen(src, pxl); | | g = gdImageGreen(src, pxl); |
| b = gdImageBlue(src, pxl); | | b = gdImageBlue(src, pxl); |
| a = gdImageAlpha(src, pxl); | | a = gdImageAlpha(src, pxl); |
| r = g = b = (int) (.299 * r + .587 * g + .114 * b); | | r = g = b = (int) (.299 * r + .587 * g + .114 * b); |
| | |
| new_pxl = gdImageColorAllocateAlpha(src, r, g, b, a); | | new_pxl = gdImageColorAllocateAlpha(src, r, g, b, a); |
| if (new_pxl == -1) { | | if (new_pxl == -1) { |
| new_pxl = gdImageColorClosestAlpha(src, r, g, b,
a); | | new_pxl = gdImageColorClosestAlpha(src, r, g, b,
a); |
| } | | } |
| gdImageSetPixel (src, x, y, new_pxl); | | gdImageSetPixel (src, x, y, new_pxl); |
| } | | } |
| } | | } |
|
| | gdImageAlphaBlending(src, alpha_blending); |
| | |
| return 1; | | return 1; |
| } | | } |
| | |
| /** | | /** |
| * Function: gdImageBrightness | | * Function: gdImageBrightness |
| * | | * |
| * Change the brightness of an image | | * Change the brightness of an image |
| * | | * |
| * Parameters: | | * Parameters: |
| * src - The image. | | * src - The image. |
| | | |
| End of changes. 4 change blocks. |
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| 0 lines changed or deleted | | 12 lines changed or added |
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