thirdparty/scummvm
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blit speed up

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This commit is contained in:
Vincent Hamm 2003-08-30 19:15:05 +00:00
parent 8dadf8823b
commit 07b1f5b45b
1 changed files with 19 additions and 8 deletions
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27
screen.cpp
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@ -236,29 +236,40 @@ void screenBlocksBlitDirtyBlocks()
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_ALWAYS);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glDepthMask(GL_TRUE);
for(i=0;i<40;i++)
{
for(j=0;j<30;j++)
{
if(screenBlockData[i][j].isDirty)
{
glRasterPos2i(i*16, j*16);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_ALWAYS);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glDepthMask(GL_TRUE);
// find the largest possible line
int width = 1;
int temp = i+1;
screenBlockData[i][j].isDirty = false;
while(temp <40 && screenBlockData[temp][j].isDirty)
{
screenBlockData[temp][j].isDirty = false;
width++;
}
/* This loop here is to prevent using PixelZoom that may be unoptimized for the 1.0 / -1.0 case
in some drivers...
*/
for (int y = 0; y < 16; y++)
{
glRasterPos2i(j*16, i*16 + y);
glDrawPixels(16, 1, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, dataTemp+((j*16 +y) * 640)+(i*16));
glDrawPixels(16*width, 1, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, dataTemp+((j*16 +y) * 640)+(i*16));
}
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glDepthFunc(GL_LESS);
}
}
}
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glDepthFunc(GL_LESS);
}