thirdparty/scummvm
2
0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

TINYGL: Implemented alpha blending and color transformation in sprite blitting for Grim TinyGL renderer.

Browse source
This commit is contained in:
Stefano Musumeci 2014-06-20 14:13:52 +02:00
parent 63fd685589
commit 109767e513
10 changed files with 197 additions and 273 deletions
Download patch file Download diff file Expand all files Collapse all files

39
graphics/tinygl/ztriangle.cpp
View file

@ -72,33 +72,18 @@ FORCEINLINE static void putPixelMappingPerspective(FrameBuffer *buffer, int buf,
c_r = (col >> textureFormat.rShift) & 0xFF;
c_g = (col >> textureFormat.gShift) & 0xFF;
c_b = (col >> textureFormat.bShift) & 0xFF;
if (c_a == 0xFF) {
tmp = rgba & 0xF81F07E0;
unsigned int light = tmp | (tmp >> 16);
unsigned int l_r = (light & 0xF800) >> 8;
unsigned int l_g = (light & 0x07E0) >> 3;
unsigned int l_b = (light & 0x001F) << 3;
unsigned int l_a = (a / 256);
c_a = (c_a * l_a) / 256;
c_r = (c_r * l_r) / 256;
c_g = (c_g * l_g) / 256;
c_b = (c_b * l_b) / 256;
buffer->writePixel(buf + _a, c_a, c_r, c_g, c_b);
pz[_a] = z;
} else if (c_a != 0) { // Implementing non binary alpha blending.
tmp = rgba & 0xF81F07E0;
unsigned int light = tmp | (tmp >> 16);
unsigned int l_r = (light & 0xF800) >> 8;
unsigned int l_g = (light & 0x07E0) >> 3;
unsigned int l_b = (light & 0x001F) << 3;
unsigned int l_a = (a / 256);
c_a = (c_a * l_a) / 256;
c_r = (c_r * l_r) / 256;
c_g = (c_g * l_g) / 256;
c_b = (c_b * l_b) / 256;
buffer->writePixel(buf + _a, c_a, c_r, c_g, c_b);
pz[_a] = z;
}
tmp = rgba & 0xF81F07E0;
unsigned int light = tmp | (tmp >> 16);
unsigned int l_r = (light & 0xF800) >> 8;
unsigned int l_g = (light & 0x07E0) >> 3;
unsigned int l_b = (light & 0x001F) << 3;
unsigned int l_a = (a / 256);
c_a = (c_a * l_a) / 256;
c_r = (c_r * l_r) / 256;
c_g = (c_g * l_g) / 256;
c_b = (c_b * l_b) / 256;
buffer->writePixel(buf + _a, c_a, c_r, c_g, c_b);
pz[_a] = z;
}
z += dzdx;
s += dsdx;