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Simple Windows-only headless screenshot compare.

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This commit is contained in:
Unknown W. Brackets 2013-02-06 08:10:00 -08:00
parent f875e3699f
commit eb6258d4d8
1 changed files with 49 additions and 1 deletions
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50
headless/WindowsHeadlessHost.cpp
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@ -91,7 +91,55 @@ void WindowsHeadlessHost::SendDebugOutput(const std::string &output)
void WindowsHeadlessHost::SendDebugScreenshot(const u8 *pixbuf, u32 w, u32 h)
{
fprintf_s(out, "Got a screenshot: %d/%d\n", w, h);
// We ignore the current framebuffer parameters and just grab the full screen.
const static int FRAME_WIDTH = 512;
const static int FRAME_HEIGHT = 272;
u32 *pixels = (u32 *) calloc(FRAME_WIDTH * FRAME_HEIGHT, sizeof(u32));
u32 *reference = (u32 *) calloc(FRAME_WIDTH * FRAME_HEIGHT, sizeof(u32));
// TODO: Maybe the GPU should do this?
glReadBuffer(GL_FRONT);
glReadPixels(0, 0, FRAME_WIDTH, FRAME_HEIGHT, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
BITMAPFILEHEADER header;
BITMAPINFOHEADER infoHeader;
FILE *bmp = fopen(comparisonScreenshot.c_str(), "rb");
if (bmp)
{
fread(&header, sizeof(header), 1, bmp);
fread(&infoHeader, sizeof(infoHeader), 1, bmp);
fread(reference, sizeof(u32), FRAME_WIDTH * FRAME_HEIGHT, bmp);
fclose(bmp);
}
else
fprintf_s(out, "Unable to read screenshot: %s\n", comparisonScreenshot.c_str());
// TODO: Better error rate and move to headless/shared between platforms.
int errors = 0;
for (int i = 0; i < FRAME_WIDTH * FRAME_HEIGHT; ++i)
{
// Ignore alpha.
errors += (pixels[i] & 0xFFFFFF) != (reference[i] & 0xFFFFFF) ? 1 : 0;
}
if (errors != 0)
{
fprintf_s(out, "Screenshot error: %f%%\n", (float) errors * 100.0f / (float) (FRAME_WIDTH * FRAME_HEIGHT));
FILE *saved = fopen("__testfailure.bmp", "wb");
if (saved)
{
fwrite(&header, sizeof(header), 1, saved);
fwrite(&infoHeader, sizeof(infoHeader), 1, saved);
fwrite(pixels, sizeof(u32), FRAME_WIDTH * FRAME_HEIGHT, saved);
fclose(saved);
fprintf_s(out, "Actual output written to: __testfailure.bmp\n");
}
}
free(pixels);
free(reference);
}
void WindowsHeadlessHost::SetComparisonScreenshot(const std::string &filename)