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draw_image can now draw images with x<0, fixes

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this isn't used at all in the source
This commit is contained in:
jacob1 2017-06-11 22:01:11 -04:00
parent 0ea5c1d0e0
commit d4a0ff9ac8
1 changed files with 33 additions and 9 deletions

42
src/graphics/RasterDrawMethods.inl

@ -445,26 +445,48 @@ void PIXELMETHODS_CLASS::clearrect(int x, int y, int w, int h)
void PIXELMETHODS_CLASS::draw_image(pixel *img, int x, int y, int w, int h, int a)
{
int i, j, r, g, b;
if (!img) return;
if(y + h > VIDYRES) h = ((VIDYRES)-y)-1; //Adjust height to prevent drawing off the bottom
int startX = 0;
if (!img)
return;
// Adjust height to prevent drawing off the bottom
if (y + h > VIDYRES)
h = ((VIDYRES)-y)-1;
// Too big
if (x + w > VIDXRES)
return;
// Starts off the top of the screen, adjust
if (y < 0 && -y < h)
{
img += -y*w;
h += y;
y = 0;
}
if(!h || y < 0) return;
if(a >= 255)
for (j=0; j<h; j++)
for (i=0; i<w; i++)
// Starts off the left side of the screen, adjust
if (x < 0 && -x < w)
{
startX = -x;
}
if (!h || y < 0 || !w)
return;
if (a >= 255)
for (int j = 0; j < h; j++)
{
img += startX;
for (int i = startX; i < w; i++)
{
vid[(y+j)*(VIDXRES)+(x+i)] = *img;
img++;
}
}
else
for (j=0; j<h; j++)
for (i=0; i<w; i++)
{
int r, g, b;
for (int j = 0; j < h; j++)
{
img += startX;
for (int i = startX; i < w; i++)
{
r = PIXR(*img);
g = PIXG(*img);
@ -472,6 +494,8 @@ void PIXELMETHODS_CLASS::draw_image(pixel *img, int x, int y, int w, int h, int
blendpixel(x+i, y+j, r, g, b, a);
img++;
}
}
}
}
void PIXELMETHODS_CLASS::draw_image(const VideoBuffer & vidBuf, int x, int y, int a)