-/* $Id: s_accum.c,v 1.2 2000/11/05 18:24:40 keithw Exp $ */
+/* $Id: s_accum.c,v 1.11 2001/04/20 19:21:41 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
- *
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
- *
+ *
+ * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ *
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
- *
+ *
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
- *
+ *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
*/
+#include "glheader.h"
#include "context.h"
#include "macros.h"
+#include "mmath.h"
#include "mem.h"
#include "s_accum.h"
+#include "s_alphabuf.h"
#include "s_context.h"
#include "s_masking.h"
#include "s_span.h"
void
_mesa_alloc_accum_buffer( GLcontext *ctx )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLint n;
if (ctx->DrawBuffer->Accum) {
ctx->DrawBuffer->Accum = (GLaccum *) MALLOC( n );
if (!ctx->DrawBuffer->Accum) {
/* unable to setup accumulation buffer */
- gl_error( ctx, GL_OUT_OF_MEMORY, "glAccum" );
+ _mesa_error( ctx, GL_OUT_OF_MEMORY, "glAccum" );
}
#ifdef USE_OPTIMIZED_ACCUM
- ctx->IntegerAccumMode = GL_TRUE;
+ swrast->_IntegerAccumMode = GL_TRUE;
#else
- ctx->IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumMode = GL_FALSE;
#endif
- ctx->IntegerAccumScaler = 0.0;
+ swrast->_IntegerAccumScaler = 0.0;
}
*/
static void rescale_accum( GLcontext *ctx )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
const GLuint n = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height * 4;
const GLfloat fChanMax = (1 << (sizeof(GLchan) * 8)) - 1;
- const GLfloat s = ctx->IntegerAccumScaler * (32767.0 / fChanMax);
+ const GLfloat s = swrast->_IntegerAccumScaler * (32767.0 / fChanMax);
GLaccum *accum = ctx->DrawBuffer->Accum;
GLuint i;
- assert(ctx->IntegerAccumMode);
+ assert(swrast->_IntegerAccumMode);
assert(accum);
for (i = 0; i < n; i++) {
accum[i] = (GLaccum) (accum[i] * s);
}
- ctx->IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumMode = GL_FALSE;
}
void
_mesa_clear_accum_buffer( GLcontext *ctx )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLuint buffersize;
GLfloat acc_scale;
- if (ctx->Visual.AccumRedBits==0) {
+ if (ctx->Visual.accumRedBits==0) {
/* No accumulation buffer! */
return;
}
b = (GLaccum) (ctx->Accum.ClearColor[2] * acc_scale);
a = (GLaccum) (ctx->Accum.ClearColor[3] * acc_scale);
/* size of region to clear */
- width = 4 * (ctx->DrawBuffer->Xmax - ctx->DrawBuffer->Xmin);
- height = ctx->DrawBuffer->Ymax - ctx->DrawBuffer->Ymin;
+ width = 4 * (ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin);
+ height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
/* ptr to first element to clear */
row = ctx->DrawBuffer->Accum
- + 4 * (ctx->DrawBuffer->Ymin * ctx->DrawBuffer->Width
- + ctx->DrawBuffer->Xmin);
+ + 4 * (ctx->DrawBuffer->_Ymin * ctx->DrawBuffer->Width
+ + ctx->DrawBuffer->_Xmin);
for (j=0;j<height;j++) {
for (i=0;i<width;i+=4) {
row[i+0] = r;
if (ctx->Accum.ClearColor[0] == 0.0 && ctx->Accum.ClearColor[1] == 0.0 &&
ctx->Accum.ClearColor[2] == 0.0 && ctx->Accum.ClearColor[3] == 0.0) {
#ifdef USE_OPTIMIZED_ACCUM
- ctx->IntegerAccumMode = GL_TRUE;
+ swrast->_IntegerAccumMode = GL_TRUE;
#else
- ctx->IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumMode = GL_FALSE;
#endif
- ctx->IntegerAccumScaler = 0.0; /* denotes empty accum buffer */
+ swrast->_IntegerAccumScaler = 0.0; /* denotes empty accum buffer */
}
else {
- ctx->IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumMode = GL_FALSE;
}
}
}
void
_swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
- GLint xpos, GLint ypos,
+ GLint xpos, GLint ypos,
GLint width, GLint height )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLuint width4;
GLfloat acc_scale;
GLchan rgba[MAX_WIDTH][4];
const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask);
const GLint iChanMax = (1 << (sizeof(GLchan) * 8)) - 1;
const GLfloat fChanMax = (1 << (sizeof(GLchan) * 8)) - 1;
-
+
if (SWRAST_CONTEXT(ctx)->NewState)
_swrast_validate_derived( ctx );
if (!ctx->DrawBuffer->Accum) {
- _mesa_warning(ctx,
+ _mesa_warning(ctx,
"Calling glAccum() without an accumulation "
"buffer (low memory?)");
return;
case GL_ADD:
if (value != 0.0F) {
const GLaccum intVal = (GLaccum) (value * acc_scale);
- GLuint j;
+ GLint j;
/* Leave optimized accum buffer mode */
- if (ctx->IntegerAccumMode)
+ if (swrast->_IntegerAccumMode)
rescale_accum(ctx);
for (j = 0; j < height; j++) {
GLaccum * acc = ctx->DrawBuffer->Accum + ypos * width4 + 4 * xpos;
case GL_MULT:
if (value != 1.0F) {
- GLuint j;
+ GLint j;
/* Leave optimized accum buffer mode */
- if (ctx->IntegerAccumMode)
+ if (swrast->_IntegerAccumMode)
rescale_accum(ctx);
for (j = 0; j < height; j++) {
GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + 4 * xpos;
if (value == 0.0F)
return;
- (*ctx->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
+ (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
+ ctx->Pixel.DriverReadBuffer );
/* May have to leave optimized accum buffer mode */
- if (ctx->IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)
- ctx->IntegerAccumScaler = value;
- if (ctx->IntegerAccumMode && value != ctx->IntegerAccumScaler)
+ if (swrast->_IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)
+ swrast->_IntegerAccumScaler = value;
+ if (swrast->_IntegerAccumMode && value != swrast->_IntegerAccumScaler)
rescale_accum(ctx);
-
- RENDER_START(ctx);
- if (ctx->IntegerAccumMode) {
+ RENDER_START(swrast,ctx);
+
+ if (swrast->_IntegerAccumMode) {
/* simply add integer color values into accum buffer */
- GLuint j;
+ GLint j;
GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos * 4;
- assert(ctx->IntegerAccumScaler > 0.0);
- assert(ctx->IntegerAccumScaler <= 1.0);
+ assert(swrast->_IntegerAccumScaler > 0.0);
+ assert(swrast->_IntegerAccumScaler <= 1.0);
for (j = 0; j < height; j++) {
-
- GLuint i, i4;
- gl_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
+
+ GLint i, i4;
+ _mesa_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
for (i = i4 = 0; i < width; i++, i4+=4) {
acc[i4+0] += rgba[i][RCOMP];
acc[i4+1] += rgba[i][GCOMP];
const GLfloat gscale = value * acc_scale / fChanMax;
const GLfloat bscale = value * acc_scale / fChanMax;
const GLfloat ascale = value * acc_scale / fChanMax;
- GLuint j;
+ GLint j;
for (j=0;j<height;j++) {
GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos * 4;
- GLuint i;
- gl_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
+ GLint i;
+ _mesa_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
for (i=0;i<width;i++) {
*acc += (GLaccum) ( (GLfloat) rgba[i][RCOMP] * rscale ); acc++;
*acc += (GLaccum) ( (GLfloat) rgba[i][GCOMP] * gscale ); acc++;
}
}
/* restore read buffer = draw buffer (the default) */
- (*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
- RENDER_FINISH(ctx);
+ (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
+ ctx->Color.DriverDrawBuffer );
+ RENDER_FINISH(swrast,ctx);
break;
case GL_LOAD:
- (*ctx->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
+ (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
+ ctx->Pixel.DriverReadBuffer );
/* This is a change to go into optimized accum buffer mode */
if (value > 0.0 && value <= 1.0) {
#ifdef USE_OPTIMIZED_ACCUM
- ctx->IntegerAccumMode = GL_TRUE;
+ swrast->_IntegerAccumMode = GL_TRUE;
#else
- ctx->IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumMode = GL_FALSE;
#endif
- ctx->IntegerAccumScaler = value;
+ swrast->_IntegerAccumScaler = value;
}
else {
- ctx->IntegerAccumMode = GL_FALSE;
- ctx->IntegerAccumScaler = 0.0;
+ swrast->_IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumScaler = 0.0;
}
- RENDER_START(ctx);
- if (ctx->IntegerAccumMode) {
+ RENDER_START(swrast,ctx);
+ if (swrast->_IntegerAccumMode) {
/* just copy values into accum buffer */
- GLuint j;
+ GLint j;
GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos * 4;
- assert(ctx->IntegerAccumScaler > 0.0);
- assert(ctx->IntegerAccumScaler <= 1.0);
+ assert(swrast->_IntegerAccumScaler > 0.0);
+ assert(swrast->_IntegerAccumScaler <= 1.0);
for (j = 0; j < height; j++) {
- GLuint i, i4;
- gl_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
+ GLint i, i4;
+ _mesa_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
for (i = i4 = 0; i < width; i++, i4 += 4) {
acc[i4+0] = rgba[i][RCOMP];
acc[i4+1] = rgba[i][GCOMP];
const GLfloat bscale = value * acc_scale / fChanMax;
const GLfloat ascale = value * acc_scale / fChanMax;
const GLfloat d = 3.0 / acc_scale;
- GLuint i, j;
+ GLint i, j;
for (j = 0; j < height; j++) {
GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos * 4;
- gl_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
+ _mesa_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
for (i=0;i<width;i++) {
*acc++ = (GLaccum) ((GLfloat) rgba[i][RCOMP] * rscale + d);
*acc++ = (GLaccum) ((GLfloat) rgba[i][GCOMP] * gscale + d);
}
/* restore read buffer = draw buffer (the default) */
- (*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
+ (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
ctx->Color.DriverDrawBuffer );
- RENDER_FINISH(ctx);
+ RENDER_FINISH(swrast,ctx);
break;
case GL_RETURN:
/* May have to leave optimized accum buffer mode */
- if (ctx->IntegerAccumMode && value != 1.0)
+ if (swrast->_IntegerAccumMode && value != 1.0)
rescale_accum(ctx);
- RENDER_START(ctx);
- if (ctx->IntegerAccumMode && ctx->IntegerAccumScaler > 0) {
+ RENDER_START(swrast,ctx);
+ if (swrast->_IntegerAccumMode && swrast->_IntegerAccumScaler > 0) {
/* build lookup table to avoid many floating point multiplies */
static GLchan multTable[32768];
static GLfloat prevMult = 0.0;
- const GLfloat mult = ctx->IntegerAccumScaler;
+ const GLfloat mult = swrast->_IntegerAccumScaler;
const GLint max = MIN2((GLint) (256 / mult), 32767);
- GLuint j;
+ GLint j;
if (mult != prevMult) {
for (j = 0; j < max; j++)
- multTable[j] = (GLint) ((GLfloat) j * mult + 0.5F);
+ multTable[j] = IROUND((GLfloat) j * mult);
prevMult = mult;
}
- assert(ctx->IntegerAccumScaler > 0.0);
- assert(ctx->IntegerAccumScaler <= 1.0);
+ assert(swrast->_IntegerAccumScaler > 0.0);
+ assert(swrast->_IntegerAccumScaler <= 1.0);
for (j = 0; j < height; j++) {
const GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos*4;
- GLuint i, i4;
+ GLint i, i4;
for (i = i4 = 0; i < width; i++, i4 += 4) {
ASSERT(acc[i4+0] < max);
ASSERT(acc[i4+1] < max);
if (colorMask != 0xffffffff) {
_mesa_mask_rgba_span( ctx, width, xpos, ypos, rgba );
}
- (*ctx->Driver.WriteRGBASpan)( ctx, width, xpos, ypos,
+ (*swrast->Driver.WriteRGBASpan)( ctx, width, xpos, ypos,
(const GLchan (*)[4])rgba, NULL );
+ if (ctx->DrawBuffer->UseSoftwareAlphaBuffers
+ && ctx->Color.ColorMask[ACOMP]) {
+ _mesa_write_alpha_span(ctx, width, xpos, ypos,
+ (CONST GLchan (*)[4]) rgba, NULL);
+ }
ypos++;
}
}
const GLfloat gscale = value / acc_scale * fChanMax;
const GLfloat bscale = value / acc_scale * fChanMax;
const GLfloat ascale = value / acc_scale * fChanMax;
- GLuint i, j;
+ GLint i, j;
for (j=0;j<height;j++) {
const GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos*4;
for (i=0;i<width;i++) {
- GLint r, g, b, a;
- r = (GLint) ( (GLfloat) (*acc++) * rscale + 0.5F );
- g = (GLint) ( (GLfloat) (*acc++) * gscale + 0.5F );
- b = (GLint) ( (GLfloat) (*acc++) * bscale + 0.5F );
- a = (GLint) ( (GLfloat) (*acc++) * ascale + 0.5F );
+ GLint r = IROUND( (GLfloat) (acc[0]) * rscale );
+ GLint g = IROUND( (GLfloat) (acc[1]) * gscale );
+ GLint b = IROUND( (GLfloat) (acc[2]) * bscale );
+ GLint a = IROUND( (GLfloat) (acc[3]) * ascale );
+ acc += 4;
rgba[i][RCOMP] = CLAMP( r, 0, iChanMax );
rgba[i][GCOMP] = CLAMP( g, 0, iChanMax );
rgba[i][BCOMP] = CLAMP( b, 0, iChanMax );
if (colorMask != 0xffffffff) {
_mesa_mask_rgba_span( ctx, width, xpos, ypos, rgba );
}
- (*ctx->Driver.WriteRGBASpan)( ctx, width, xpos, ypos,
+ (*swrast->Driver.WriteRGBASpan)( ctx, width, xpos, ypos,
(const GLchan (*)[4])rgba, NULL );
+ if (ctx->DrawBuffer->UseSoftwareAlphaBuffers
+ && ctx->Color.ColorMask[ACOMP]) {
+ _mesa_write_alpha_span(ctx, width, xpos, ypos,
+ (CONST GLchan (*)[4]) rgba, NULL);
+ }
ypos++;
}
}
- RENDER_FINISH(ctx);
+ RENDER_FINISH(swrast,ctx);
break;
default:
- gl_error( ctx, GL_INVALID_ENUM, "glAccum" );
+ _mesa_error( ctx, GL_INVALID_ENUM, "glAccum" );
}
}
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