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clean-up of optimized GL_RETURN code

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This commit is contained in:
Brian Paul 1999-10-20 22:39:16 +00:00
parent 34c7c1838a
commit 2fb055d891
1 changed files with 19 additions and 18 deletions
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37
src/mesa/main/accum.c
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@ -1,4 +1,4 @@
/* $Id: accum.c,v 1.7 1999/10/20 22:32:02 brianp Exp $ */
/* $Id: accum.c,v 1.8 1999/10/20 22:39:16 brianp Exp $ */
/*
* Mesa 3-D graphics library
@ -342,16 +342,17 @@ void gl_Accum( GLcontext *ctx, GLenum op, GLfloat value )
rescale_accum(ctx);
if (ctx->IntegerAccumMode) {
/* build lookup table to avoid integer divides */
GLfloat divisor = 1.0F / ctx->IntegerAccumScaler;
static GLubyte divTable[32768];
static GLfloat prevDivisor = 0.0;
/* build lookup table to avoid many floating point multiplies */
const GLfloat mult = ctx->IntegerAccumScaler;
static GLchan multTable[32768];
static GLfloat prevMult = 0.0;
GLuint j;
if (divisor != prevDivisor) {
assert(divisor * 256 <= 32768);
for (j = 0; j < divisor * 256; j++)
divTable[j] = (GLint) ((GLfloat) j / divisor + 0.5F);
prevDivisor = divisor;
const GLint max = 256 / mult;
if (mult != prevMult) {
assert(max <= 32768);
for (j = 0; j < max; j++)
multTable[j] = (GLint) ((GLfloat) j * mult + 0.5F);
prevMult = mult;
}
assert(ctx->IntegerAccumScaler > 0.0);
@ -360,14 +361,14 @@ void gl_Accum( GLcontext *ctx, GLenum op, GLfloat value )
const GLaccum *acc = ctx->Buffer->Accum + ypos * width4 + xpos*4;
GLuint i, i4;
for (i = i4 = 0; i < width; i++, i4 += 4) {
ASSERT(acc[i4+0] < divisor * 256);
ASSERT(acc[i4+1] < divisor * 256);
ASSERT(acc[i4+2] < divisor * 256);
ASSERT(acc[i4+3] < divisor * 256);
rgba[i][RCOMP] = divTable[acc[i4+0]];
rgba[i][GCOMP] = divTable[acc[i4+1]];
rgba[i][BCOMP] = divTable[acc[i4+2]];
rgba[i][ACOMP] = divTable[acc[i4+3]];
ASSERT(acc[i4+0] < max);
ASSERT(acc[i4+1] < max);
ASSERT(acc[i4+2] < max);
ASSERT(acc[i4+3] < max);
rgba[i][RCOMP] = multTable[acc[i4+0]];
rgba[i][GCOMP] = multTable[acc[i4+1]];
rgba[i][BCOMP] = multTable[acc[i4+2]];
rgba[i][ACOMP] = multTable[acc[i4+3]];
}
if (ctx->Color.SWmasking) {
gl_mask_rgba_span( ctx, width, xpos, ypos, rgba );