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gdi32/tests: Added tests for copying a single pixel from top down and bottom up bitmaps.

This commit is contained in:
John Edmonds 2011-02-20 22:30:29 -05:00 committed by Alexandre Julliard
parent e9ab576c73
commit d2e1478db0
1 changed files with 98 additions and 0 deletions
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98
dlls/gdi32/tests/bitmap.c
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@ -3050,6 +3050,101 @@ static void test_32bit_bitmap_blt(void)
DeleteDC(hdcScreen);
}
/*
* Used by test_GetDIBits_single_pixel_destination to create the bitmap to test against.
*/
static void setup_picture(char *picture, int bpp)
{
int i;
switch(bpp)
{
case 16:
case 32:
/*Set the first byte in each pixel to the index of that pixel.*/
for (i = 0; i < 4; i++)
picture[i * (bpp / 8)] = i;
break;
case 24:
picture[0] = 0;
picture[3] = 1;
/*Each scanline in a bitmap must be a multiple of 4 bytes long.*/
picture[8] = 2;
picture[11] = 3;
break;
}
}
static void test_GetDIBits_single_pixel_destination(int bpp)
{
BITMAPINFO bi;
HBITMAP bmptb, bmpbt;
HDC hdc;
int pixelOut;
int *picture;
int statusCode;
bi.bmiHeader.biSize=sizeof(bi.bmiHeader);
bi.bmiHeader.biWidth=2;
bi.bmiHeader.biHeight=2;
bi.bmiHeader.biPlanes=1;
bi.bmiHeader.biBitCount=bpp;
bi.bmiHeader.biCompression=BI_RGB;
/*Get the device context for the screen.*/
hdc = GetDC(NULL);
ok(hdc != NULL, "Could not get a handle to a device context.\n");
/*Create the bottom to top image (image's bottom scan line is at the top in memory).*/
bmpbt = CreateDIBSection(hdc, &bi, DIB_RGB_COLORS, (void**)&picture, NULL, 0);
ok(bmpbt != NULL, "Could not create a DIB section.\n");
/*Now that we have a pointer to the pixels, we write to them.*/
setup_picture((char*)picture, bpp);
/*Create the top to bottom image (images' bottom scan line is at the bottom in memory).*/
bi.bmiHeader.biHeight=-2; /*We specify that we want a top to bottom image by specifying a negative height.*/
bmptb = CreateDIBSection(hdc, &bi, DIB_RGB_COLORS, (void**)&picture, NULL, 0);
ok(bmptb != NULL, "Could not create a DIB section.\n");
/*Write to this top to bottom bitmap.*/
setup_picture((char*)picture, bpp);
bi.bmiHeader.biWidth = 1;
bi.bmiHeader.biHeight = 2;
statusCode = GetDIBits(hdc, bmpbt, 0, 1, &pixelOut, &bi, DIB_RGB_COLORS);
ok(statusCode, "Failed to call GetDIBits. Status code: %d.\n", statusCode);
/*Check the first byte of the pixel.*/
ok((char)pixelOut == 0, "Bottom-up -> bottom-up: first pixel should be 0 but was %d.\n", (char)pixelOut);
statusCode = GetDIBits(hdc, bmptb, 0, 1, &pixelOut, &bi, DIB_RGB_COLORS);
ok(statusCode, "Failed to call GetDIBits. Status code: %d.\n", statusCode);
todo_wine ok((char)pixelOut == 2, "Top-down -> bottom-up: first pixel should be 2 but was %d.\n", (char)pixelOut);
/*Check second scanline.*/
statusCode = GetDIBits(hdc, bmptb, 1, 1, &pixelOut, &bi, DIB_RGB_COLORS);
ok(statusCode, "Failed to call GetDIBits. Status code: %d.\n", statusCode);
todo_wine ok((char)pixelOut == 0, "Top-down -> bottom-up: first pixel should be 0 but was %d.\n", (char)pixelOut);
statusCode = GetDIBits(hdc, bmpbt, 1, 1, &pixelOut, &bi, DIB_RGB_COLORS);
ok(statusCode, "Failed to call GetDIBits. Status code: %d.\n", statusCode);
ok((char)pixelOut == 2, "Top-down -> bottom-up: first pixel should be 2 but was %d.\n", (char)pixelOut);
/*Make destination bitmap top-down. Windows (and soon, Wine) will ignore this.*/
bi.bmiHeader.biHeight = -2;
statusCode = GetDIBits(hdc, bmpbt, 0, 1, &pixelOut, &bi, DIB_RGB_COLORS);
ok(statusCode, "Failed to call GetDIBits. Status code: %d.\n", statusCode);
ok((char)pixelOut == 0, "Bottom-up -> top-down: first pixel should be 0 but was %d.\n", (char)pixelOut);
statusCode = GetDIBits(hdc, bmptb, 0, 1, &pixelOut, &bi, DIB_RGB_COLORS);
ok(statusCode, "Failed to call GetDIBits. Status code: %d.\n", statusCode);
todo_wine ok((char)pixelOut == 2, "Top-down -> top-down: first pixel should be 2 but was %d.\n", (char)pixelOut);
/*Check second scanline.*/
statusCode = GetDIBits(hdc, bmptb, 1, 1, &pixelOut, &bi, DIB_RGB_COLORS);
ok(statusCode, "Failed to call GetDIBits. Status code: %d.\n", statusCode);
todo_wine ok((char)pixelOut == 0, "Top-down -> bottom-up: first pixel should be 0 but was %d.\n", (char)pixelOut);
statusCode = GetDIBits(hdc, bmpbt, 1, 1, &pixelOut, &bi, DIB_RGB_COLORS);
ok(statusCode, "Failed to call GetDIBits. Status code: %d.\n", statusCode);
ok((char)pixelOut == 2, "Top-down -> bottom-up: first pixel should be 2 but was %d.\n", (char)pixelOut);
DeleteObject(bmpbt);
DeleteObject(bmptb);
}
START_TEST(bitmap)
{
HMODULE hdll;
@ -3080,4 +3175,7 @@ START_TEST(bitmap)
test_bitmapinfoheadersize();
test_get16dibits();
test_clipping();
test_GetDIBits_single_pixel_destination(16);
test_GetDIBits_single_pixel_destination(24);
test_GetDIBits_single_pixel_destination(32);
}