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Optimization for screenshot flipping

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This commit is contained in:
Nick Whitlock 2023-05-24 01:28:46 -04:00
parent b880e8625b
commit 619c5d43f8
1 changed files with 14 additions and 14 deletions
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28
neo/renderer/RenderSystem_init.cpp
View file

@ -1300,15 +1300,16 @@ If ref == NULL, session->updateScreen will be used
==================
*/
void idRenderSystemLocal::TakeScreenshot( int width, int height, const char *fileName, int blends, renderView_t *ref, int overrideFormat ) {
byte *buffer, *flippedBuffer;
byte *buffer, *swapBuffer;
int i, j, k;
takingScreenshot = true;
int pix = width * height;
int lineSize = width * 3;
buffer = (byte *)R_StaticAlloc(pix*3);
flippedBuffer = (byte*)R_StaticAlloc(pix*3);
swapBuffer = (byte*)R_StaticAlloc(lineSize);
if ( blends <= 1 ) {
R_ReadTiledPixels( width, height, buffer, ref );
@ -1337,14 +1338,13 @@ void idRenderSystemLocal::TakeScreenshot( int width, int height, const char *fil
}
// The buffer is upside down, we need to flip it the right way.
for (i = 0; i < width; i++) {
for (j = 0; j < height; j++) {
for (k = 0; k < 3; k++) {
flippedBuffer[(i + j * width) * 3 + k] = buffer[(i + (height - 1 - j) * width) * 3 + k];
}
}
for (i = 0; i < height / 2; ++i) {
byte* line1 = &buffer[i * lineSize];
byte* line2 = &buffer[(height - i - 1) * lineSize];
memcpy(swapBuffer, line1, lineSize);
memcpy(line1, line2, lineSize);
memcpy(line2, swapBuffer, lineSize);
}
idFile* f;
if (strstr(fileName, "viewnote")) {
@ -1361,24 +1361,24 @@ void idRenderSystemLocal::TakeScreenshot( int width, int height, const char *fil
switch (overrideFormat) {
default:
stbi_write_tga_to_func( WriteScreenshot, f, width, height, 3, flippedBuffer );
stbi_write_tga_to_func( WriteScreenshot, f, width, height, 3, buffer );
break;
case 1:
stbi_write_bmp_to_func( WriteScreenshot, f, width, height, 3, flippedBuffer );
stbi_write_bmp_to_func( WriteScreenshot, f, width, height, 3, buffer);
break;
case 2:
stbi_write_png_compression_level = idMath::ClampInt(0, 9, cvarSystem->GetCVarInteger("r_screenshotPngCompression"));
stbi_write_png_to_func( WriteScreenshot, f, width, height, 3, flippedBuffer, 3 * width );
stbi_write_png_to_func( WriteScreenshot, f, width, height, 3, buffer, 3 * width );
break;
case 3:
stbi_write_jpg_to_func( WriteScreenshot, f, width, height, 3, flippedBuffer, idMath::ClampInt(1, 100, cvarSystem->GetCVarInteger("r_screenshotJpgQuality")) );
stbi_write_jpg_to_func( WriteScreenshot, f, width, height, 3, buffer, idMath::ClampInt(1, 100, cvarSystem->GetCVarInteger("r_screenshotJpgQuality")) );
break;
}
fileSystem->CloseFile(f);
R_StaticFree( buffer );
R_StaticFree( flippedBuffer );
R_StaticFree( swapBuffer );
takingScreenshot = false;