| /************************************************************************** |
| * |
| * 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_MAP_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); |
| } |
| } |