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adjustment to coverage sample positions

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This commit is contained in:
Brian Paul 2001-03-28 21:37:24 +00:00
parent 16a8e986ce
commit f1f288182e
2 changed files with 36 additions and 35 deletions
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6
src/mesa/swrast/s_aaline.c
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@ -1,4 +1,4 @@
/* $Id: s_aaline.c,v 1.6 2001/03/12 00:48:41 gareth Exp $ */
/* $Id: s_aaline.c,v 1.7 2001/03/28 21:37:24 brianp Exp $ */
/*
* Mesa 3-D graphics library
@ -234,8 +234,8 @@ make_sample_table(GLint xSamples, GLint ySamples, GLfloat samples[][2])
else {
j = i++;
}
samples[j][0] = x * dx;
samples[j][1] = y * dy;
samples[j][0] = x * dx + 0.5 * dx;
samples[j][1] = y * dy + 0.5 * dy;
}
}
}

65
src/mesa/swrast/s_aatriangle.c
View file

@ -1,4 +1,4 @@
/* $Id: s_aatriangle.c,v 1.10 2001/03/19 02:25:36 keithw Exp $ */
/* $Id: s_aatriangle.c,v 1.11 2001/03/28 21:37:24 brianp Exp $ */
/*
* Mesa 3-D graphics library
@ -138,25 +138,26 @@ static GLfloat
compute_coveragef(const GLfloat v0[3], const GLfloat v1[3],
const GLfloat v2[3], GLint winx, GLint winy)
{
#define B 0.125
static const GLfloat samples[16][2] = {
/* start with the four corners */
{ 0.00, 0.00 },
{ 0.75, 0.00 },
{ 0.00, 0.75 },
{ 0.75, 0.75 },
{ 0.00+B, 0.00+B },
{ 0.75+B, 0.00+B },
{ 0.00+B, 0.75+B },
{ 0.75+B, 0.75+B },
/* continue with interior samples */
{ 0.25, 0.00 },
{ 0.50, 0.00 },
{ 0.00, 0.25 },
{ 0.25, 0.25 },
{ 0.50, 0.25 },
{ 0.75, 0.25 },
{ 0.00, 0.50 },
{ 0.25, 0.50 },
{ 0.50, 0.50 },
{ 0.75, 0.50 },
{ 0.25, 0.75 },
{ 0.50, 0.75 }
{ 0.25+B, 0.00+B },
{ 0.50+B, 0.00+B },
{ 0.00+B, 0.25+B },
{ 0.25+B, 0.25+B },
{ 0.50+B, 0.25+B },
{ 0.75+B, 0.25+B },
{ 0.00+B, 0.50+B },
{ 0.25+B, 0.50+B },
{ 0.50+B, 0.50+B },
{ 0.75+B, 0.50+B },
{ 0.25+B, 0.75+B },
{ 0.50+B, 0.75+B }
};
const GLfloat x = (GLfloat) winx;
const GLfloat y = (GLfloat) winy;
@ -226,23 +227,23 @@ compute_coveragei(const GLfloat v0[3], const GLfloat v1[3],
*/
static const GLfloat samples[15][2] = {
/* start with the four corners */
{ 0.00, 0.00 },
{ 0.75, 0.00 },
{ 0.00, 0.75 },
{ 0.75, 0.75 },
{ 0.00+B, 0.00+B },
{ 0.75+B, 0.00+B },
{ 0.00+B, 0.75+B },
{ 0.75+B, 0.75+B },
/* continue with interior samples */
{ 0.25, 0.00 },
{ 0.50, 0.00 },
{ 0.00, 0.25 },
{ 0.25, 0.25 },
{ 0.50, 0.25 },
{ 0.75, 0.25 },
{ 0.00, 0.50 },
{ 0.25, 0.50 },
{ 0.25+B, 0.00+B },
{ 0.50+B, 0.00+B },
{ 0.00+B, 0.25+B },
{ 0.25+B, 0.25+B },
{ 0.50+B, 0.25+B },
{ 0.75+B, 0.25+B },
{ 0.00+B, 0.50+B },
{ 0.25+B, 0.50+B },
/*{ 0.50, 0.50 },*/
{ 0.75, 0.50 },
{ 0.25, 0.75 },
{ 0.50, 0.75 }
{ 0.75+B, 0.50+B },
{ 0.25+B, 0.75+B },
{ 0.50+B, 0.75+B }
};
const GLfloat x = (GLfloat) winx;
const GLfloat y = (GLfloat) winy;