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updated for PBOs

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This commit is contained in:
Brian Paul
2004-10-31 17:04:07 +00:00
parent b6f97582dd
commit d56928f10d
1 changed files with 57 additions and 4 deletions
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61
src/mesa/main/histogram.c
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@@ -1,6 +1,6 @@
/*
* Mesa 3-D graphics library
* Version: 6.1
* Version: 6.3
*
* Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
*
@@ -24,6 +24,7 @@
#include "glheader.h"
#include "bufferobj.h"
#include "colormac.h"
#include "context.h"
#include "image.h"
@@ -705,7 +706,7 @@ _mesa_GetMinmax(GLenum target, GLboolean reset, GLenum format, GLenum type, GLvo
format != GL_ABGR_EXT &&
format != GL_LUMINANCE &&
format != GL_LUMINANCE_ALPHA) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetHistogram(format)");
_mesa_error(ctx, GL_INVALID_ENUM, "glGetMinMax(format)");
}
if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
@@ -713,8 +714,29 @@ _mesa_GetMinmax(GLenum target, GLboolean reset, GLenum format, GLenum type, GLvo
return;
}
if (!values)
if (ctx->Pack.BufferObj->Name) {
/* pack min/max values into a PBO */
GLubyte *buf;
if (!_mesa_validate_pbo_access(&ctx->Pack, 2, 1, 1,
format, type, values)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetMinMax(invalid PBO access)");
return;
}
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
GL_WRITE_ONLY_ARB,
ctx->Pack.BufferObj);
if (!buf) {
/* buffer is already mapped - that's an error */
_mesa_error(ctx, GL_INVALID_OPERATION,"glGetMinMax(PBO is mapped)");
return;
}
values = ADD_POINTERS(buf, values);
}
else if (!values) {
/* not an error */
return;
}
{
GLfloat minmax[2][4];
@@ -730,6 +752,11 @@ _mesa_GetMinmax(GLenum target, GLboolean reset, GLenum format, GLenum type, GLvo
format, type, values, &ctx->Pack, 0);
}
if (ctx->Pack.BufferObj->Name) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
ctx->Pack.BufferObj);
}
if (reset) {
_mesa_ResetMinmax(GL_MINMAX);
}
@@ -771,13 +798,39 @@ _mesa_GetHistogram(GLenum target, GLboolean reset, GLenum format, GLenum type, G
return;
}
if (!values)
if (ctx->Pack.BufferObj->Name) {
/* pack min/max values into a PBO */
GLubyte *buf;
if (!_mesa_validate_pbo_access(&ctx->Pack, ctx->Histogram.Width, 1, 1,
format, type, values)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetHistogram(invalid PBO access)");
return;
}
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
GL_WRITE_ONLY_ARB,
ctx->Pack.BufferObj);
if (!buf) {
/* buffer is already mapped - that's an error */
_mesa_error(ctx,GL_INVALID_OPERATION,"glGetHistogram(PBO is mapped)");
return;
}
values = ADD_POINTERS(buf, values);
}
else if (!values) {
/* not an error */
return;
}
pack_histogram(ctx, ctx->Histogram.Width,
(CONST GLuint (*)[4]) ctx->Histogram.Count,
format, type, values, &ctx->Pack);
if (ctx->Pack.BufferObj->Name) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
ctx->Pack.BufferObj);
}
if (reset) {
GLuint i;
for (i = 0; i < HISTOGRAM_TABLE_SIZE; i++) {