89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
#include "gd.h"
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#include "gdtest.h"
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#define WIDTH 12
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#define BLOCK_SIZE 4
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static const int expected_upperleft[][3] = {
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{0x000000, 0x040404, 0x080808},
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{0x303030, 0x343434, 0x383838},
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{0x606060, 0x646464, 0x686868}
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};
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static const int expected_average[][3] = {
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{0x131313, 0x171717, 0x1b1b1b},
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{0x434343, 0x474747, 0x4b4b4b},
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{0x737373, 0x777777, 0x7b7b7b},
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};
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#define SETUP_PIXELS(im) do { \
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int x, y, i = 0; \
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for (y = 0; y < (im)->sy; y++) { \
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for (x = 0; x < (im)->sx; x++) { \
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int p = gdImageColorResolve(im, i, i, i); \
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gdImageSetPixel(im, x, y, p); \
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i++; \
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} \
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} \
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} while (0)
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#define CHECK_PIXELS(im, expected) do { \
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int x, y; \
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for (y = 0; y < (im)->sy; y++) { \
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for (x = 0; x < (im)->sx; x++) { \
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int p = gdImageGetPixel(im, x, y); \
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int r = ((expected)[y/BLOCK_SIZE][x/BLOCK_SIZE]>>16)&0xFF; \
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int g = ((expected)[y/BLOCK_SIZE][x/BLOCK_SIZE]>> 8)&0xFF; \
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int b = ((expected)[y/BLOCK_SIZE][x/BLOCK_SIZE] )&0xFF; \
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if (r != gdImageRed(im, p)) { \
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gdTestErrorMsg("Red %x is expected, but %x\n", r, gdImageRed(im, p)); \
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return 0; \
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} \
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if (g != gdImageGreen(im, p)) { \
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gdTestErrorMsg("Green %x is expected, but %x\n", g, gdImageGreen(im, p)); \
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return 0; \
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} \
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if (b != gdImageBlue(im, p)) { \
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gdTestErrorMsg("Blue %x is expected, but %x\n", b, gdImageBlue(im, p)); \
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return 0; \
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} \
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} \
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} \
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} while (0)
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static int testPixelate(gdImagePtr im)
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{
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if (gdImagePixelate(im, -1, GD_PIXELATE_UPPERLEFT) != 0) return 0;
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if (gdImagePixelate(im, 1, GD_PIXELATE_UPPERLEFT) != 1) return 0;
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if (gdImagePixelate(im, 2, -1) != 0) return 0;
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SETUP_PIXELS(im);
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if (!gdImagePixelate(im, BLOCK_SIZE, GD_PIXELATE_UPPERLEFT)) return 0;
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CHECK_PIXELS(im, expected_upperleft);
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SETUP_PIXELS(im);
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if (!gdImagePixelate(im, BLOCK_SIZE, GD_PIXELATE_AVERAGE)) return 0;
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CHECK_PIXELS(im, expected_average);
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return 1;
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}
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int main()
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{
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gdImagePtr im;
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im = gdImageCreate(WIDTH, WIDTH);
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if (!testPixelate(im)) {
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return 1;
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}
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gdImageDestroy(im);
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im = gdImageCreateTrueColor(WIDTH, WIDTH);
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if (!testPixelate(im)) {
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return 2;
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}
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gdImageDestroy(im);
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return 0;
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}
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