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/* $Id: drawpix.c,v 1.45 2000/11/16 21:05:34 keithw Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2000 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.
*/
#ifdef PC_HEADER
#include "all.h"
#else
#include "glheader.h"
#include "colormac.h"
#include "context.h"
#include "drawpix.h"
#include "feedback.h"
#include "macros.h"
#include "mem.h"
#include "mmath.h"
#include "state.h"
#include "types.h"
#include "swrast/swrast.h"
#endif
/*
* Execute glDrawPixels
*/
void
_mesa_DrawPixels( GLsizei width, GLsizei height,
GLenum format, GLenum type, const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx, "_mesa_DrawPixels" );
if (ctx->RenderMode==GL_RENDER) {
GLint x, y;
if (!pixels || !ctx->Current.RasterPosValid) {
return;
}
if (ctx->NewState) {
gl_update_state(ctx);
}
x = (GLint) (ctx->Current.RasterPos[0] + 0.5F);
y = (GLint) (ctx->Current.RasterPos[1] + 0.5F);
ctx->OcclusionResult = GL_TRUE;
/* see if device driver can do the drawpix */
RENDER_START(ctx);
if (ctx->Driver.DrawPixels
&& (*ctx->Driver.DrawPixels)(ctx, x, y, width, height, format, type,
&ctx->Unpack, pixels)) {
/* finished */
} else
_swrast_DrawPixels( ctx, x, y, width, height, format, type,
&ctx->Unpack, pixels );
RENDER_FINISH(ctx);
}
else if (ctx->RenderMode==GL_FEEDBACK) {
if (ctx->Current.RasterPosValid) {
GLfloat color[4];
GLfloat texcoord[4], invq;
FLUSH_TNL( ctx, FLUSH_UPDATE_CURRENT );
color[0] = CHAN_TO_FLOAT(ctx->Current.Color[0]);
color[1] = CHAN_TO_FLOAT(ctx->Current.Color[1]);
color[2] = CHAN_TO_FLOAT(ctx->Current.Color[2]);
color[3] = CHAN_TO_FLOAT(ctx->Current.Color[3]);
invq = 1.0F / ctx->Current.Texcoord[0][3];
texcoord[0] = ctx->Current.Texcoord[0][0] * invq;
texcoord[1] = ctx->Current.Texcoord[0][1] * invq;
texcoord[2] = ctx->Current.Texcoord[0][2] * invq;
texcoord[3] = ctx->Current.Texcoord[0][3];
FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
gl_feedback_vertex( ctx,
ctx->Current.RasterPos,
color, ctx->Current.Index, texcoord );
}
}
else if (ctx->RenderMode==GL_SELECT) {
if (ctx->Current.RasterPosValid) {
gl_update_hitflag( ctx, ctx->Current.RasterPos[2] );
}
}
}
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