thirdparty/scummvm
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GRIM: implement scaling for screenshot and add filtering

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This commit is contained in:
Paweł Kołodziejski 2012-01-27 20:01:12 +01:00
parent 29d224bde7
commit cea5828be3
2 changed files with 40 additions and 34 deletions
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39
engines/grim/gfx_opengl.cpp
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@ -1213,24 +1213,25 @@ Bitmap *GfxOpenGL::getScreenshot(int w, int h) {
Graphics::PixelBuffer src(Graphics::PixelFormat(4, 8, 8, 8, 8, 0, 8, 16, 24), _screenWidth * _screenHeight, DisposeAfterUse::YES);
glReadPixels(0, 0, _screenWidth, _screenHeight, GL_RGBA, GL_UNSIGNED_BYTE, src.getRawBuffer());
int step = 0;
for (int y = 0; y <= 479; y++) {
for (int x = 0; x <= 639; x++) {
uint8 r, g, b;
src.getRGBAt(y * 640 + x, r, g, b);
uint32 color = (r + g + b) / 3;
src.setPixelAt(step++, color, color, color);
}
}
int i1 = (_screenWidth * w - 1) / _screenWidth + 1;
int j1 = (_screenHeight * h - 1) / _screenHeight + 1;
float step_x = (float)_screenWidth / w;
float step_y = (float)_screenHeight / h;
step = 0;
uint8 r, g, b;
for (float y = 479; y >= 0; y -= step_y) {
for (float x = 0; x < 639; x += step_x) {
src.getRGBAt((int)y * _screenWidth + (int)x, r, g, b);
buffer.setPixelAt(step++, r, g, b);
for (int j = 0; j < j1; j++) {
for (int i = 0; i < i1; i++) {
int x0 = i * _screenWidth / w;
int x1 = ((i + 1) * _screenWidth - 1) / w + 1;
int y0 = j * _screenHeight / h;
int y1 = ((j + 1) * _screenHeight - 1) / h + 1;
uint32 color = 0;
for (int y = y0; y < y1; y++) {
for (int x = x0; x < x1; x++) {
uint8 lr, lg, lb;
src.getRGBAt(y * _screenWidth + x, lr, lg, lb);
color += (lr + lg + lb) / 3;
}
}
color /= (x1 - x0) * (y1 - y0);
buffer.setPixelAt((h - j - 1) * w + i, color, color, color);
}
}
@ -1275,6 +1276,10 @@ void GfxOpenGL::dimScreen() {
}
void GfxOpenGL::dimRegion(int x, int yReal, int w, int h, float level) {
x = (int)(x * _scaleW);
yReal = (int)(yReal *_scaleH);
w = (int)(w * _scaleW);
h = (int)(h * _scaleH);
uint32 *data = new uint32[w * h];
int y = _screenHeight - yReal;