-/* $Id: s_pixeltex.c,v 1.1 2000/10/31 18:00:04 keithw Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
- *
+ * Version: 4.1
+ *
+ * Copyright (C) 1999-2002 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 "colormac.h"
+#include "imports.h"
+#include "s_context.h"
#include "s_pixeltex.h"
+#include "s_texture.h"
/*
* Convert RGBA values into strq texture coordinates.
*/
-void
-_mesa_pixeltexgen(GLcontext *ctx, GLuint n, const GLchan rgba[][4],
- GLfloat s[], GLfloat t[], GLfloat r[], GLfloat q[])
+static void
+pixeltexgen(GLcontext *ctx, GLuint n, const GLchan rgba[][4],
+ GLfloat texcoord[][4])
{
if (ctx->Pixel.FragmentRgbSource == GL_CURRENT_RASTER_COLOR) {
GLuint i;
for (i = 0; i < n; i++) {
- s[i] = ctx->Current.RasterColor[RCOMP];
- t[i] = ctx->Current.RasterColor[GCOMP];
- r[i] = ctx->Current.RasterColor[BCOMP];
+ texcoord[i][0] = ctx->Current.RasterColor[RCOMP];
+ texcoord[i][1] = ctx->Current.RasterColor[GCOMP];
+ texcoord[i][2] = ctx->Current.RasterColor[BCOMP];
}
}
else {
GLuint i;
ASSERT(ctx->Pixel.FragmentRgbSource == GL_PIXEL_GROUP_COLOR_SGIS);
for (i = 0; i < n; i++) {
- s[i] = CHAN_TO_FLOAT(rgba[i][RCOMP]);
- t[i] = CHAN_TO_FLOAT(rgba[i][GCOMP]);
- r[i] = CHAN_TO_FLOAT(rgba[i][BCOMP]);
+ texcoord[i][0] = CHAN_TO_FLOAT(rgba[i][RCOMP]);
+ texcoord[i][1] = CHAN_TO_FLOAT(rgba[i][GCOMP]);
+ texcoord[i][2] = CHAN_TO_FLOAT(rgba[i][BCOMP]);
}
}
if (ctx->Pixel.FragmentAlphaSource == GL_CURRENT_RASTER_COLOR) {
GLuint i;
for (i = 0; i < n; i++) {
- q[i] = ctx->Current.RasterColor[ACOMP];
+ texcoord[i][3] = ctx->Current.RasterColor[ACOMP];
}
}
else {
GLuint i;
ASSERT(ctx->Pixel.FragmentAlphaSource == GL_PIXEL_GROUP_COLOR_SGIS);
for (i = 0; i < n; i++) {
- q[i] = CHAN_TO_FLOAT(rgba[i][ACOMP]);
+ texcoord[i][3] = CHAN_TO_FLOAT(rgba[i][ACOMP]);
+ }
+ }
+}
+
+
+
+/*
+ * Used by glDraw/CopyPixels: the incoming image colors are treated
+ * as texture coordinates. Use those coords to texture the image.
+ * This is for GL_SGIS_pixel_texture / GL_SGIX_pixel_texture.
+ */
+void
+_swrast_pixel_texture(GLcontext *ctx, struct sw_span *span)
+{
+ GLuint unit;
+
+ ASSERT(!(span->arrayMask & SPAN_TEXTURE));
+ span->arrayMask |= SPAN_TEXTURE;
+
+ /* convert colors into texture coordinates */
+ pixeltexgen( ctx, span->end,
+ (const GLchan (*)[4]) span->array->rgba,
+ span->array->texcoords[0] );
+
+ /* copy the new texture units for all enabled units */
+ for (unit = 1; unit < ctx->Const.MaxTextureUnits; unit++) {
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ MEMCPY( span->array->texcoords[unit], span->array->texcoords[0],
+ span->end * 4 * sizeof(GLfloat) );
}
}
+
+ /* apply texture mapping */
+ _swrast_texture_span( ctx, span );
+
+ /* this is a work-around to be fixed by initializing again span */
+ span->arrayMask &= ~SPAN_TEXTURE;
}