1 /************************************************************************** 2 * 3 * Copyright 2007 VMware, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 /* Authors: 29 * Brian Paul 30 */ 31 32 #include "st_context.h" 33 #include "st_sampler_view.h" 34 #include "st_texture.h" 35 36 #include "util/u_inlines.h" 37 #include "util/u_pack_color.h" 38 39 40 /** 41 * Update the pixelmap texture with the contents of the R/G/B/A pixel maps. 42 */ 43 static void 44 load_color_map_texture(struct gl_context *ctx, struct pipe_resource *pt) 45 { 46 struct st_context *st = st_context(ctx); 47 struct pipe_context *pipe = st->pipe; 48 struct pipe_transfer *transfer; 49 const GLuint rSize = ctx->PixelMaps.RtoR.Size; 50 const GLuint gSize = ctx->PixelMaps.GtoG.Size; 51 const GLuint bSize = ctx->PixelMaps.BtoB.Size; 52 const GLuint aSize = ctx->PixelMaps.AtoA.Size; 53 const uint texSize = pt->width0; 54 uint *dest; 55 uint i, j; 56 57 dest = (uint *) pipe_transfer_map(pipe, 58 pt, 0, 0, PIPE_TRANSFER_WRITE, 59 0, 0, texSize, texSize, &transfer); 60 61 /* Pack four 1D maps into a 2D texture: 62 * R map is placed horizontally, indexed by S, in channel 0 63 * G map is placed vertically, indexed by T, in channel 1 64 * B map is placed horizontally, indexed by S, in channel 2 65 * A map is placed vertically, indexed by T, in channel 3 66 */ 67 for (i = 0; i < texSize; i++) { 68 for (j = 0; j < texSize; j++) { 69 union util_color uc; 70 int k = (i * texSize + j); 71 float rgba[4]; 72 rgba[0] = ctx->PixelMaps.RtoR.Map[j * rSize / texSize]; 73 rgba[1] = ctx->PixelMaps.GtoG.Map[i * gSize / texSize]; 74 rgba[2] = ctx->PixelMaps.BtoB.Map[j * bSize / texSize]; 75 rgba[3] = ctx->PixelMaps.AtoA.Map[i * aSize / texSize]; 76 util_pack_color(rgba, pt->format, &uc); 77 *(dest + k) = uc.ui[0]; 78 } 79 } 80 81 pipe_transfer_unmap(pipe, transfer); 82 } 83 84 /** 85 * Upload the pixel transfer color map texture. 86 */ 87 static void 88 update_pixel_transfer(struct st_context *st) 89 { 90 struct gl_context *ctx = st->ctx; 91 92 if (ctx->Pixel.MapColorFlag) { 93 /* create the colormap/texture now if not already done */ 94 if (!st->pixel_xfer.pixelmap_texture) { 95 st->pixel_xfer.pixelmap_texture = st_create_color_map_texture(ctx); 96 st->pixel_xfer.pixelmap_sampler_view = 97 st_create_texture_sampler_view(st->pipe, 98 st->pixel_xfer.pixelmap_texture); 99 } 100 load_color_map_texture(ctx, st->pixel_xfer.pixelmap_texture); 101 } 102 } 103 104 105 const struct st_tracked_state st_update_pixel_transfer = { 106 update_pixel_transfer /* update */ 107 }; 108