+++ /dev/null
-/**************************************************************************
- *
- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
- * 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, sub license, 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 (including the
- * next paragraph) 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 NON-INFRINGEMENT.
- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- **************************************************************************/
-
- /*
- * Authors:
- * Brian Paul
- */
-
-#include "main/imports.h"
-#include "main/image.h"
-#include "main/macros.h"
-#include "main/mfeatures.h"
-
-#include "st_debug.h"
-#include "st_context.h"
-#include "st_cb_accum.h"
-#include "st_cb_fbo.h"
-#include "st_texture.h"
-#include "pipe/p_context.h"
-#include "pipe/p_defines.h"
-#include "util/u_format.h"
-#include "util/u_inlines.h"
-#include "util/u_tile.h"
-
-
-#if FEATURE_accum
-
-/**
- * For hardware that supports deep color buffers, we could accelerate
- * most/all the accum operations with blending/texturing.
- * For now, just use the get/put_tile() functions and do things in software.
- */
-
-
-void
-st_clear_accum_buffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
-{
- struct st_renderbuffer *acc_strb = st_renderbuffer(rb);
- const GLint xpos = ctx->DrawBuffer->_Xmin;
- const GLint ypos = ctx->DrawBuffer->_Ymin;
- const GLint width = ctx->DrawBuffer->_Xmax - xpos;
- const GLint height = ctx->DrawBuffer->_Ymax - ypos;
- size_t stride = acc_strb->stride;
- GLubyte *data = acc_strb->data;
-
- if(!data)
- return;
-
- switch (acc_strb->format) {
- case PIPE_FORMAT_R16G16B16A16_SNORM:
- {
- GLshort r = FLOAT_TO_SHORT(ctx->Accum.ClearColor[0]);
- GLshort g = FLOAT_TO_SHORT(ctx->Accum.ClearColor[1]);
- GLshort b = FLOAT_TO_SHORT(ctx->Accum.ClearColor[2]);
- GLshort a = FLOAT_TO_SHORT(ctx->Accum.ClearColor[3]);
- int i, j;
- for (i = 0; i < height; i++) {
- GLshort *dst = (GLshort *) (data + (ypos + i) * stride + xpos * 8);
- for (j = 0; j < width; j++) {
- dst[0] = r;
- dst[1] = g;
- dst[2] = b;
- dst[3] = a;
- dst += 4;
- }
- }
- }
- break;
- default:
- _mesa_problem(ctx, "unexpected format in st_clear_accum_buffer()");
- }
-}
-
-
-/** For ADD/MULT */
-static void
-accum_mad(struct gl_context *ctx, GLfloat scale, GLfloat bias,
- GLint xpos, GLint ypos, GLint width, GLint height,
- struct st_renderbuffer *acc_strb)
-{
- size_t stride = acc_strb->stride;
- GLubyte *data = acc_strb->data;
-
- switch (acc_strb->format) {
- case PIPE_FORMAT_R16G16B16A16_SNORM:
- {
- int i, j;
- for (i = 0; i < height; i++) {
- GLshort *acc = (GLshort *) (data + (ypos + i) * stride + xpos * 8);
- for (j = 0; j < width * 4; j++) {
- float val = SHORT_TO_FLOAT(*acc) * scale + bias;
- *acc++ = FLOAT_TO_SHORT(val);
- }
- }
- }
- break;
- default:
- _mesa_problem(NULL, "unexpected format in st_clear_accum_buffer()");
- }
-}
-
-
-static void
-accum_accum(struct st_context *st, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height,
- struct st_renderbuffer *acc_strb,
- struct st_renderbuffer *color_strb)
-{
- struct pipe_context *pipe = st->pipe;
- struct pipe_transfer *color_trans;
- size_t stride = acc_strb->stride;
- GLubyte *data = acc_strb->data;
- GLfloat *buf;
-
- if (ST_DEBUG & DEBUG_FALLBACK)
- debug_printf("%s: fallback processing\n", __FUNCTION__);
-
- color_trans = pipe_get_transfer(st->pipe,
- color_strb->texture,
- 0, 0,
- PIPE_TRANSFER_READ, xpos, ypos,
- width, height);
-
- buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
-
- pipe_get_tile_rgba_format(pipe, color_trans, 0, 0, width, height,
- util_format_linear(color_strb->texture->format),
- buf);
-
- switch (acc_strb->format) {
- case PIPE_FORMAT_R16G16B16A16_SNORM:
- {
- const GLfloat *color = buf;
- int i, j;
- for (i = 0; i < height; i++) {
- GLshort *acc = (GLshort *) (data + (ypos + i) * stride + xpos * 8);
- for (j = 0; j < width * 4; j++) {
- float val = *color++ * value;
- *acc++ += FLOAT_TO_SHORT(val);
- }
- }
- }
- break;
- default:
- _mesa_problem(NULL, "unexpected format in st_clear_accum_buffer()");
- }
-
- free(buf);
- pipe->transfer_destroy(pipe, color_trans);
-}
-
-
-static void
-accum_load(struct st_context *st, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height,
- struct st_renderbuffer *acc_strb,
- struct st_renderbuffer *color_strb)
-{
- struct pipe_context *pipe = st->pipe;
- struct pipe_transfer *color_trans;
- size_t stride = acc_strb->stride;
- GLubyte *data = acc_strb->data;
- GLfloat *buf;
-
- if (ST_DEBUG & DEBUG_FALLBACK)
- debug_printf("%s: fallback processing\n", __FUNCTION__);
-
- color_trans = pipe_get_transfer(st->pipe, color_strb->texture,
- 0, 0,
- PIPE_TRANSFER_READ, xpos, ypos,
- width, height);
-
- buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
-
- pipe_get_tile_rgba_format(pipe, color_trans, 0, 0, width, height,
- util_format_linear(color_strb->texture->format),
- buf);
-
- switch (acc_strb->format) {
- case PIPE_FORMAT_R16G16B16A16_SNORM:
- {
- const GLfloat *color = buf;
- int i, j;
- for (i = 0; i < height; i++) {
- GLshort *acc = (GLshort *) (data + (ypos + i) * stride + xpos * 8);
- for (j = 0; j < width * 4; j++) {
- float val = *color++ * value;
- *acc++ = FLOAT_TO_SHORT(val);
- }
- }
- }
- break;
- default:
- _mesa_problem(NULL, "unexpected format in st_clear_accum_buffer()");
- }
-
- free(buf);
- pipe->transfer_destroy(pipe, color_trans);
-}
-
-
-static void
-accum_return(struct gl_context *ctx, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height,
- struct st_renderbuffer *acc_strb,
- struct st_renderbuffer *color_strb)
-{
- struct pipe_context *pipe = st_context(ctx)->pipe;
- const GLubyte *colormask = ctx->Color.ColorMask[0];
- enum pipe_transfer_usage usage;
- struct pipe_transfer *color_trans;
- size_t stride = acc_strb->stride;
- const GLubyte *data = acc_strb->data;
- GLfloat *buf;
- enum pipe_format format = util_format_linear(color_strb->texture->format);
-
- if (ST_DEBUG & DEBUG_FALLBACK)
- debug_printf("%s: fallback processing\n", __FUNCTION__);
-
- buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
-
- if (!colormask[0] || !colormask[1] || !colormask[2] || !colormask[3])
- usage = PIPE_TRANSFER_READ_WRITE;
- else
- usage = PIPE_TRANSFER_WRITE;
-
- color_trans = pipe_get_transfer(pipe,
- color_strb->texture, 0, 0,
- usage,
- xpos, ypos,
- width, height);
-
- if (usage & PIPE_TRANSFER_READ)
- pipe_get_tile_rgba_format(pipe, color_trans, 0, 0, width, height,
- format, buf);
-
- switch (acc_strb->format) {
- case PIPE_FORMAT_R16G16B16A16_SNORM:
- {
- GLfloat *color = buf;
- int i, j, ch;
- for (i = 0; i < height; i++) {
- const GLshort *acc = (const GLshort *) (data + (ypos + i) * stride + xpos * 8);
- for (j = 0; j < width; j++) {
- for (ch = 0; ch < 4; ch++) {
- if (colormask[ch]) {
- GLfloat val = SHORT_TO_FLOAT(*acc * value);
- *color = CLAMP(val, 0.0f, 1.0f);
- }
- else {
- /* No change */
- }
- ++acc;
- ++color;
- }
- }
- }
- }
- break;
- default:
- _mesa_problem(NULL, "unexpected format in st_clear_accum_buffer()");
- }
-
- pipe_put_tile_rgba_format(pipe, color_trans, 0, 0, width, height,
- format, buf);
-
- free(buf);
- pipe->transfer_destroy(pipe, color_trans);
-}
-
-
-static void
-st_Accum(struct gl_context *ctx, GLenum op, GLfloat value)
-{
- struct st_context *st = st_context(ctx);
- struct st_renderbuffer *acc_strb
- = st_renderbuffer(ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer);
- struct st_renderbuffer *color_strb
- = st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
-
- const GLint xpos = ctx->DrawBuffer->_Xmin;
- const GLint ypos = ctx->DrawBuffer->_Ymin;
- const GLint width = ctx->DrawBuffer->_Xmax - xpos;
- const GLint height = ctx->DrawBuffer->_Ymax - ypos;
-
- if(!acc_strb->data)
- return;
-
- switch (op) {
- case GL_ADD:
- if (value != 0.0F) {
- accum_mad(ctx, 1.0, value, xpos, ypos, width, height, acc_strb);
- }
- break;
- case GL_MULT:
- if (value != 1.0F) {
- accum_mad(ctx, value, 0.0, xpos, ypos, width, height, acc_strb);
- }
- break;
- case GL_ACCUM:
- if (value != 0.0F) {
- accum_accum(st, value, xpos, ypos, width, height, acc_strb, color_strb);
- }
- break;
- case GL_LOAD:
- accum_load(st, value, xpos, ypos, width, height, acc_strb, color_strb);
- break;
- case GL_RETURN:
- accum_return(ctx, value, xpos, ypos, width, height, acc_strb, color_strb);
- break;
- default:
- assert(0);
- }
-}
-
-
-
-void st_init_accum_functions(struct dd_function_table *functions)
-{
- functions->Accum = st_Accum;
-}
-
-#endif /* FEATURE_accum */
+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 6.5.2
- *
- * Copyright (C) 1999-2006 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
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-#include "main/glheader.h"
-#include "main/condrender.h"
-#include "main/context.h"
-#include "main/macros.h"
-#include "main/imports.h"
-
-#include "s_accum.h"
-#include "s_context.h"
-#include "s_masking.h"
-#include "s_span.h"
-
-
-/* XXX this would have to change for accum buffers with more or less
- * than 16 bits per color channel.
- */
-#define ACCUM_SCALE16 32767.0F
-
-
-/*
- * Accumulation buffer notes
- *
- * Normally, accumulation buffer values are GLshorts with values in
- * [-32767, 32767] which represent floating point colors in [-1, 1],
- * as defined by the OpenGL specification.
- *
- * We optimize for the common case used for full-scene antialiasing:
- * // start with accum buffer cleared to zero
- * glAccum(GL_LOAD, w); // or GL_ACCUM the first image
- * glAccum(GL_ACCUM, w);
- * ...
- * glAccum(GL_ACCUM, w);
- * glAccum(GL_RETURN, 1.0);
- * That is, we start with an empty accumulation buffer and accumulate
- * n images, each with weight w = 1/n.
- * In this scenario, we can simply store unscaled integer values in
- * the accum buffer instead of scaled integers. We'll also keep track
- * of the w value so when we do GL_RETURN we simply divide the accumulated
- * values by n (n=1/w).
- * This lets us avoid _many_ int->float->int conversions.
- */
-
-
-#if CHAN_BITS == 8
-/* enable the optimization */
-#define USE_OPTIMIZED_ACCUM 1
-#else
-#define USE_OPTIMIZED_ACCUM 0
-#endif
-
-
-/**
- * This is called when we fall out of optimized/unscaled accum buffer mode.
- * That is, we convert each unscaled accum buffer value into a scaled value
- * representing the range[-1, 1].
- */
-static void
-rescale_accum( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
- const GLfloat s = swrast->_IntegerAccumScaler * (32767.0F / CHAN_MAXF);
-
- assert(rb);
- assert(rb->_BaseFormat == GL_RGBA);
- /* add other types in future? */
- assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);
- assert(swrast->_IntegerAccumMode);
-
- if (rb->GetPointer(ctx, rb, 0, 0)) {
- /* directly-addressable memory */
- GLuint y;
- for (y = 0; y < rb->Height; y++) {
- GLuint i;
- GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, 0, y);
- for (i = 0; i < 4 * rb->Width; i++) {
- acc[i] = (GLshort) (acc[i] * s);
- }
- }
- }
- else {
- /* use get/put row funcs */
- GLuint y;
- for (y = 0; y < rb->Height; y++) {
- GLshort accRow[MAX_WIDTH * 4];
- GLuint i;
- rb->GetRow(ctx, rb, rb->Width, 0, y, accRow);
- for (i = 0; i < 4 * rb->Width; i++) {
- accRow[i] = (GLshort) (accRow[i] * s);
- }
- rb->PutRow(ctx, rb, rb->Width, 0, y, accRow, NULL);
- }
- }
-
- swrast->_IntegerAccumMode = GL_FALSE;
-}
-
-
-
-/**
- * Clear the accumulation Buffer.
- */
-void
-_swrast_clear_accum_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLuint x, y, width, height;
-
- /* No accumulation buffer! Not an error. */
- if (!rb || !rb->Data)
- return;
-
- assert(rb->_BaseFormat == GL_RGBA);
- /* add other types in future? */
- assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);
-
- /* bounds, with scissor */
- x = ctx->DrawBuffer->_Xmin;
- y = ctx->DrawBuffer->_Ymin;
- width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
- height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
-
- if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
- const GLfloat accScale = 32767.0;
- GLshort clearVal[4];
- GLuint i;
-
- clearVal[0] = (GLshort) (ctx->Accum.ClearColor[0] * accScale);
- clearVal[1] = (GLshort) (ctx->Accum.ClearColor[1] * accScale);
- clearVal[2] = (GLshort) (ctx->Accum.ClearColor[2] * accScale);
- clearVal[3] = (GLshort) (ctx->Accum.ClearColor[3] * accScale);
-
- for (i = 0; i < height; i++) {
- rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);
- }
- }
- else {
- /* someday support other sizes */
- }
-
- /* update optimized accum state vars */
- 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) {
-#if USE_OPTIMIZED_ACCUM
- swrast->_IntegerAccumMode = GL_TRUE;
-#else
- swrast->_IntegerAccumMode = GL_FALSE;
-#endif
- swrast->_IntegerAccumScaler = 0.0; /* denotes empty accum buffer */
- }
- else {
- swrast->_IntegerAccumMode = GL_FALSE;
- }
-}
-
-
-static void
-accum_add(struct gl_context *ctx, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
-
- assert(rb);
-
- /* Leave optimized accum buffer mode */
- if (swrast->_IntegerAccumMode)
- rescale_accum(ctx);
-
- if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
- const GLshort incr = (GLshort) (value * ACCUM_SCALE16);
- if (rb->GetPointer(ctx, rb, 0, 0)) {
- GLint i, j;
- for (i = 0; i < height; i++) {
- GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
- for (j = 0; j < 4 * width; j++) {
- acc[j] += incr;
- }
- }
- }
- else {
- GLint i, j;
- for (i = 0; i < height; i++) {
- GLshort accRow[4 * MAX_WIDTH];
- rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);
- for (j = 0; j < 4 * width; j++) {
- accRow[j] += incr;
- }
- rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);
- }
- }
- }
- else {
- /* other types someday */
- }
-}
-
-
-static void
-accum_mult(struct gl_context *ctx, GLfloat mult,
- GLint xpos, GLint ypos, GLint width, GLint height )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
-
- assert(rb);
-
- /* Leave optimized accum buffer mode */
- if (swrast->_IntegerAccumMode)
- rescale_accum(ctx);
-
- if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
- if (rb->GetPointer(ctx, rb, 0, 0)) {
- GLint i, j;
- for (i = 0; i < height; i++) {
- GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
- for (j = 0; j < 4 * width; j++) {
- acc[j] = (GLshort) (acc[j] * mult);
- }
- }
- }
- else {
- GLint i, j;
- for (i = 0; i < height; i++) {
- GLshort accRow[4 * MAX_WIDTH];
- rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);
- for (j = 0; j < 4 * width; j++) {
- accRow[j] = (GLshort) (accRow[j] * mult);
- }
- rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);
- }
- }
- }
- else {
- /* other types someday */
- }
-}
-
-
-
-static void
-accum_accum(struct gl_context *ctx, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
- const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
-
- assert(rb);
-
- if (!ctx->ReadBuffer->_ColorReadBuffer) {
- /* no read buffer - OK */
- return;
- }
-
- /* May have to leave optimized accum buffer mode */
- if (swrast->_IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)
- swrast->_IntegerAccumScaler = value;
- if (swrast->_IntegerAccumMode && value != swrast->_IntegerAccumScaler)
- rescale_accum(ctx);
-
- if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
- const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
- GLshort accumRow[4 * MAX_WIDTH];
- GLchan rgba[MAX_WIDTH][4];
- GLint i;
-
- for (i = 0; i < height; i++) {
- GLshort *acc;
- if (directAccess) {
- acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
- }
- else {
- rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
- acc = accumRow;
- }
-
- /* read colors from color buffer */
- _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
- xpos, ypos + i, CHAN_TYPE, rgba);
-
- /* do accumulation */
- if (swrast->_IntegerAccumMode) {
- /* simply add integer color values into accum buffer */
- GLint j;
- for (j = 0; j < width; j++) {
- acc[j * 4 + 0] += rgba[j][RCOMP];
- acc[j * 4 + 1] += rgba[j][GCOMP];
- acc[j * 4 + 2] += rgba[j][BCOMP];
- acc[j * 4 + 3] += rgba[j][ACOMP];
- }
- }
- else {
- /* scaled integer (or float) accum buffer */
- GLint j;
- for (j = 0; j < width; j++) {
- acc[j * 4 + 0] += (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
- acc[j * 4 + 1] += (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
- acc[j * 4 + 2] += (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
- acc[j * 4 + 3] += (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
- }
- }
-
- if (!directAccess) {
- rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
- }
- }
- }
- else {
- /* other types someday */
- }
-}
-
-
-
-static void
-accum_load(struct gl_context *ctx, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
- const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
-
- assert(rb);
-
- if (!ctx->ReadBuffer->_ColorReadBuffer) {
- /* no read buffer - OK */
- return;
- }
-
- /* This is a change to go into optimized accum buffer mode */
- if (value > 0.0 && value <= 1.0) {
-#if USE_OPTIMIZED_ACCUM
- swrast->_IntegerAccumMode = GL_TRUE;
-#else
- swrast->_IntegerAccumMode = GL_FALSE;
-#endif
- swrast->_IntegerAccumScaler = value;
- }
- else {
- swrast->_IntegerAccumMode = GL_FALSE;
- swrast->_IntegerAccumScaler = 0.0;
- }
-
- if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
- const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
- GLshort accumRow[4 * MAX_WIDTH];
- GLchan rgba[MAX_WIDTH][4];
- GLint i;
-
- for (i = 0; i < height; i++) {
- GLshort *acc;
- if (directAccess) {
- acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
- }
- else {
- rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
- acc = accumRow;
- }
-
- /* read colors from color buffer */
- _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
- xpos, ypos + i, CHAN_TYPE, rgba);
-
- /* do load */
- if (swrast->_IntegerAccumMode) {
- /* just copy values in */
- GLint j;
- assert(swrast->_IntegerAccumScaler > 0.0);
- assert(swrast->_IntegerAccumScaler <= 1.0);
- for (j = 0; j < width; j++) {
- acc[j * 4 + 0] = rgba[j][RCOMP];
- acc[j * 4 + 1] = rgba[j][GCOMP];
- acc[j * 4 + 2] = rgba[j][BCOMP];
- acc[j * 4 + 3] = rgba[j][ACOMP];
- }
- }
- else {
- /* scaled integer (or float) accum buffer */
- GLint j;
- for (j = 0; j < width; j++) {
- acc[j * 4 + 0] = (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
- acc[j * 4 + 1] = (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
- acc[j * 4 + 2] = (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
- acc[j * 4 + 3] = (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
- }
- }
-
- if (!directAccess) {
- rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
- }
- }
- }
-}
-
-
-static void
-accum_return(struct gl_context *ctx, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_framebuffer *fb = ctx->DrawBuffer;
- struct gl_renderbuffer *accumRb = fb->Attachment[BUFFER_ACCUM].Renderbuffer;
- const GLboolean directAccess
- = (accumRb->GetPointer(ctx, accumRb, 0, 0) != NULL);
-
- static GLchan multTable[32768];
- static GLfloat prevMult = 0.0;
- const GLfloat mult = swrast->_IntegerAccumScaler;
- const GLint max = MIN2((GLint) (256 / mult), 32767);
-
- /* May have to leave optimized accum buffer mode */
- if (swrast->_IntegerAccumMode && value != 1.0)
- rescale_accum(ctx);
-
- if (swrast->_IntegerAccumMode && swrast->_IntegerAccumScaler > 0) {
- /* build lookup table to avoid many floating point multiplies */
- GLint j;
- assert(swrast->_IntegerAccumScaler <= 1.0);
- if (mult != prevMult) {
- for (j = 0; j < max; j++)
- multTable[j] = IROUND((GLfloat) j * mult);
- prevMult = mult;
- }
- }
-
- if (accumRb->DataType == GL_SHORT ||
- accumRb->DataType == GL_UNSIGNED_SHORT) {
- const GLfloat scale = value * CHAN_MAXF / ACCUM_SCALE16;
- GLuint buffer;
- GLint i;
-
- /* XXX maybe transpose the 'i' and 'buffer' loops??? */
- for (i = 0; i < height; i++) {
- GLshort accumRow[4 * MAX_WIDTH];
- GLshort *acc;
- SWspan span;
-
- /* init color span */
- INIT_SPAN(span, GL_BITMAP);
- span.end = width;
- span.arrayMask = SPAN_RGBA;
- span.x = xpos;
- span.y = ypos + i;
-
- if (directAccess) {
- acc = (GLshort *) accumRb->GetPointer(ctx, accumRb, xpos, ypos +i);
- }
- else {
- accumRb->GetRow(ctx, accumRb, width, xpos, ypos + i, accumRow);
- acc = accumRow;
- }
-
- /* get the colors to return */
- if (swrast->_IntegerAccumMode) {
- GLint j;
- for (j = 0; j < width; j++) {
- ASSERT(acc[j * 4 + 0] < max);
- ASSERT(acc[j * 4 + 1] < max);
- ASSERT(acc[j * 4 + 2] < max);
- ASSERT(acc[j * 4 + 3] < max);
- span.array->rgba[j][RCOMP] = multTable[acc[j * 4 + 0]];
- span.array->rgba[j][GCOMP] = multTable[acc[j * 4 + 1]];
- span.array->rgba[j][BCOMP] = multTable[acc[j * 4 + 2]];
- span.array->rgba[j][ACOMP] = multTable[acc[j * 4 + 3]];
- }
- }
- else {
- /* scaled integer (or float) accum buffer */
- GLint j;
- for (j = 0; j < width; j++) {
-#if CHAN_BITS==32
- GLchan r = acc[j * 4 + 0] * scale;
- GLchan g = acc[j * 4 + 1] * scale;
- GLchan b = acc[j * 4 + 2] * scale;
- GLchan a = acc[j * 4 + 3] * scale;
-#else
- GLint r = IROUND( (GLfloat) (acc[j * 4 + 0]) * scale );
- GLint g = IROUND( (GLfloat) (acc[j * 4 + 1]) * scale );
- GLint b = IROUND( (GLfloat) (acc[j * 4 + 2]) * scale );
- GLint a = IROUND( (GLfloat) (acc[j * 4 + 3]) * scale );
-#endif
- span.array->rgba[j][RCOMP] = CLAMP( r, 0, CHAN_MAX );
- span.array->rgba[j][GCOMP] = CLAMP( g, 0, CHAN_MAX );
- span.array->rgba[j][BCOMP] = CLAMP( b, 0, CHAN_MAX );
- span.array->rgba[j][ACOMP] = CLAMP( a, 0, CHAN_MAX );
- }
- }
-
- /* store colors */
- for (buffer = 0; buffer < fb->_NumColorDrawBuffers; buffer++) {
- struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buffer];
- const GLboolean masking = (!ctx->Color.ColorMask[buffer][RCOMP] ||
- !ctx->Color.ColorMask[buffer][GCOMP] ||
- !ctx->Color.ColorMask[buffer][BCOMP] ||
- !ctx->Color.ColorMask[buffer][ACOMP]);
- if (masking) {
- _swrast_mask_rgba_span(ctx, rb, &span, buffer);
- }
- rb->PutRow(ctx, rb, width, xpos, ypos + i, span.array->rgba, NULL);
- }
- }
- }
- else {
- /* other types someday */
- }
-}
-
-
-
-/**
- * Software fallback for glAccum.
- */
-void
-_swrast_Accum(struct gl_context *ctx, GLenum op, GLfloat value)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLint xpos, ypos, width, height;
-
- if (swrast->NewState)
- _swrast_validate_derived( ctx );
-
- if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) {
- _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer");
- return;
- }
-
- if (!_mesa_check_conditional_render(ctx))
- return;
-
- swrast_render_start(ctx);
-
- /* Compute region after calling swrast_render_start() so that we know the
- * drawbuffer's size/bounds are up to date.
- */
- xpos = ctx->DrawBuffer->_Xmin;
- ypos = ctx->DrawBuffer->_Ymin;
- width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
- height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
-
- switch (op) {
- case GL_ADD:
- if (value != 0.0F) {
- accum_add(ctx, value, xpos, ypos, width, height);
- }
- break;
- case GL_MULT:
- if (value != 1.0F) {
- accum_mult(ctx, value, xpos, ypos, width, height);
- }
- break;
- case GL_ACCUM:
- if (value != 0.0F) {
- accum_accum(ctx, value, xpos, ypos, width, height);
- }
- break;
- case GL_LOAD:
- accum_load(ctx, value, xpos, ypos, width, height);
- break;
- case GL_RETURN:
- accum_return(ctx, value, xpos, ypos, width, height);
- break;
- default:
- _mesa_problem(ctx, "invalid mode in _swrast_Accum()");
- break;
- }
-
- swrast_render_finish(ctx);
-}
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