103 lines
3.6 KiB
C
103 lines
3.6 KiB
C
/**************************************************************************
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*
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* Copyright 2007 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/* Authors:
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* Brian Paul
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*/
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#include "st_context.h"
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#include "st_sampler_view.h"
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#include "st_texture.h"
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#include "util/u_inlines.h"
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#include "util/u_pack_color.h"
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/**
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* Update the pixelmap texture with the contents of the R/G/B/A pixel maps.
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*/
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static void
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load_color_map_texture(struct gl_context *ctx, struct pipe_resource *pt)
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{
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struct st_context *st = st_context(ctx);
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struct pipe_context *pipe = st->pipe;
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struct pipe_transfer *transfer;
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const GLuint rSize = ctx->PixelMaps.RtoR.Size;
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const GLuint gSize = ctx->PixelMaps.GtoG.Size;
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const GLuint bSize = ctx->PixelMaps.BtoB.Size;
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const GLuint aSize = ctx->PixelMaps.AtoA.Size;
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const uint texSize = pt->width0;
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uint *dest;
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uint i, j;
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dest = (uint *) pipe_texture_map(pipe,
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pt, 0, 0, PIPE_MAP_WRITE,
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0, 0, texSize, texSize, &transfer);
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/* Pack four 1D maps into a 2D texture:
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* R map is placed horizontally, indexed by S, in channel 0
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* G map is placed vertically, indexed by T, in channel 1
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* B map is placed horizontally, indexed by S, in channel 2
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* A map is placed vertically, indexed by T, in channel 3
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*/
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for (i = 0; i < texSize; i++) {
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for (j = 0; j < texSize; j++) {
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union util_color uc;
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int k = (i * texSize + j);
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float rgba[4];
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rgba[0] = ctx->PixelMaps.RtoR.Map[j * rSize / texSize];
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rgba[1] = ctx->PixelMaps.GtoG.Map[i * gSize / texSize];
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rgba[2] = ctx->PixelMaps.BtoB.Map[j * bSize / texSize];
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rgba[3] = ctx->PixelMaps.AtoA.Map[i * aSize / texSize];
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util_pack_color(rgba, pt->format, &uc);
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*(dest + k) = uc.ui[0];
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}
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}
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pipe_texture_unmap(pipe, transfer);
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}
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/**
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* Upload the pixel transfer color map texture.
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*/
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void
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st_update_pixel_transfer(struct st_context *st)
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{
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struct gl_context *ctx = st->ctx;
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if (ctx->Pixel.MapColorFlag) {
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/* create the colormap/texture now if not already done */
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if (!st->pixel_xfer.pixelmap_texture) {
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st->pixel_xfer.pixelmap_texture = st_create_color_map_texture(ctx);
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st->pixel_xfer.pixelmap_sampler_view =
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st_create_texture_sampler_view(st->pipe,
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st->pixel_xfer.pixelmap_texture);
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}
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load_color_map_texture(ctx, st->pixel_xfer.pixelmap_texture);
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}
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}
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