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/**************************************************************************
*
* Copyright 2007 VMware, Inc.
* 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 VMWARE 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 "st_context.h"
#include "st_sampler_view.h"
#include "st_texture.h"
#include "util/u_inlines.h"
#include "util/u_pack_color.h"
/**
* Update the pixelmap texture with the contents of the R/G/B/A pixel maps.
*/
static void
load_color_map_texture(struct gl_context *ctx, struct pipe_resource *pt)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct pipe_transfer *transfer;
const GLuint rSize = ctx->PixelMaps.RtoR.Size;
const GLuint gSize = ctx->PixelMaps.GtoG.Size;
const GLuint bSize = ctx->PixelMaps.BtoB.Size;
const GLuint aSize = ctx->PixelMaps.AtoA.Size;
const uint texSize = pt->width0;
uint *dest;
uint i, j;
dest = (uint *) pipe_transfer_map(pipe,
pt, 0, 0, PIPE_TRANSFER_WRITE,
0, 0, texSize, texSize, &transfer);
/* Pack four 1D maps into a 2D texture:
* R map is placed horizontally, indexed by S, in channel 0
* G map is placed vertically, indexed by T, in channel 1
* B map is placed horizontally, indexed by S, in channel 2
* A map is placed vertically, indexed by T, in channel 3
*/
for (i = 0; i < texSize; i++) {
for (j = 0; j < texSize; j++) {
union util_color uc;
int k = (i * texSize + j);
float rgba[4];
rgba[0] = ctx->PixelMaps.RtoR.Map[j * rSize / texSize];
rgba[1] = ctx->PixelMaps.GtoG.Map[i * gSize / texSize];
rgba[2] = ctx->PixelMaps.BtoB.Map[j * bSize / texSize];
rgba[3] = ctx->PixelMaps.AtoA.Map[i * aSize / texSize];
util_pack_color(rgba, pt->format, &uc);
*(dest + k) = uc.ui[0];
}
}
pipe_transfer_unmap(pipe, transfer);
}
/**
* Upload the pixel transfer color map texture.
*/
void
st_update_pixel_transfer(struct st_context *st)
{
struct gl_context *ctx = st->ctx;
if (ctx->Pixel.MapColorFlag) {
/* create the colormap/texture now if not already done */
if (!st->pixel_xfer.pixelmap_texture) {
st->pixel_xfer.pixelmap_texture = st_create_color_map_texture(ctx);
st->pixel_xfer.pixelmap_sampler_view =
st_create_texture_sampler_view(st->pipe,
st->pixel_xfer.pixelmap_texture);
}
load_color_map_texture(ctx, st->pixel_xfer.pixelmap_texture);
}
}
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