1 /************************************************************************** 2 * 3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. 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 TUNGSTEN GRAPHICS 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 29 #include "main/imports.h" 30 #include "main/mipmap.h" 31 #include "main/teximage.h" 32 33 #include "pipe/p_context.h" 34 #include "pipe/p_defines.h" 35 #include "util/u_inlines.h" 36 #include "util/u_format.h" 37 #include "util/u_gen_mipmap.h" 38 39 #include "st_debug.h" 40 #include "st_context.h" 41 #include "st_texture.h" 42 #include "st_gen_mipmap.h" 43 #include "st_cb_texture.h" 44 45 46 /** 47 * one-time init for generate mipmap 48 * XXX Note: there may be other times we need no-op/simple state like this. 49 * In that case, some code refactoring would be good. 50 */ 51 void 52 st_init_generate_mipmap(struct st_context *st) 53 { 54 st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context); 55 } 56 57 58 void 59 st_destroy_generate_mipmap(struct st_context *st) 60 { 61 util_destroy_gen_mipmap(st->gen_mipmap); 62 st->gen_mipmap = NULL; 63 } 64 65 66 /** 67 * Generate mipmap levels using hardware rendering. 68 * \return TRUE if successful, FALSE if not possible 69 */ 70 static boolean 71 st_render_mipmap(struct st_context *st, 72 GLenum target, 73 struct st_texture_object *stObj, 74 uint baseLevel, uint lastLevel) 75 { 76 struct pipe_context *pipe = st->pipe; 77 struct pipe_screen *screen = pipe->screen; 78 struct pipe_sampler_view *psv; 79 const uint face = _mesa_tex_target_to_face(target); 80 81 #if 0 82 assert(target != GL_TEXTURE_3D); /* implemented but untested */ 83 #endif 84 85 /* check if we can render in the texture's format */ 86 /* XXX should probably kill this and always use util_gen_mipmap 87 since this implements a sw fallback as well */ 88 if (!screen->is_format_supported(screen, stObj->pt->format, 89 stObj->pt->target, 90 0, PIPE_BIND_RENDER_TARGET)) { 91 return FALSE; 92 } 93 94 psv = st_create_texture_sampler_view(pipe, stObj->pt); 95 96 /* Disable conditional rendering. */ 97 if (st->render_condition) { 98 pipe->render_condition(pipe, NULL, 0); 99 } 100 101 util_gen_mipmap(st->gen_mipmap, psv, face, baseLevel, lastLevel, 102 PIPE_TEX_FILTER_LINEAR); 103 104 if (st->render_condition) { 105 pipe->render_condition(pipe, st->render_condition, st->condition_mode); 106 } 107 108 pipe_sampler_view_reference(&psv, NULL); 109 110 return TRUE; 111 } 112 113 /** 114 * Compute the expected number of mipmap levels in the texture given 115 * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/ 116 * GL_TEXTURE_MAX_LEVEL settings. This will tell us how many mipmap 117 * levels should be generated. 118 */ 119 static GLuint 120 compute_num_levels(struct gl_context *ctx, 121 struct gl_texture_object *texObj, 122 GLenum target) 123 { 124 const struct gl_texture_image *baseImage; 125 GLuint numLevels; 126 127 baseImage = _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel); 128 129 numLevels = texObj->BaseLevel + baseImage->MaxNumLevels; 130 numLevels = MIN2(numLevels, texObj->MaxLevel + 1); 131 assert(numLevels >= 1); 132 133 return numLevels; 134 } 135 136 137 /** 138 * Called via ctx->Driver.GenerateMipmap(). 139 */ 140 void 141 st_generate_mipmap(struct gl_context *ctx, GLenum target, 142 struct gl_texture_object *texObj) 143 { 144 struct st_context *st = st_context(ctx); 145 struct st_texture_object *stObj = st_texture_object(texObj); 146 struct pipe_resource *pt = st_get_texobj_resource(texObj); 147 const uint baseLevel = texObj->BaseLevel; 148 uint lastLevel; 149 uint dstLevel; 150 151 if (!pt) 152 return; 153 154 /* not sure if this ultimately actually should work, 155 but we're not supporting multisampled textures yet. */ 156 assert(pt->nr_samples < 2); 157 158 /* find expected last mipmap level to generate*/ 159 lastLevel = compute_num_levels(ctx, texObj, target) - 1; 160 161 if (lastLevel == 0) 162 return; 163 164 /* The texture isn't in a "complete" state yet so set the expected 165 * lastLevel here, since it won't get done in st_finalize_texture(). 166 */ 167 stObj->lastLevel = lastLevel; 168 169 if (pt->last_level < lastLevel) { 170 /* The current gallium texture doesn't have space for all the 171 * mipmap levels we need to generate. So allocate a new texture. 172 */ 173 struct pipe_resource *oldTex = stObj->pt; 174 175 /* create new texture with space for more levels */ 176 stObj->pt = st_texture_create(st, 177 oldTex->target, 178 oldTex->format, 179 lastLevel, 180 oldTex->width0, 181 oldTex->height0, 182 oldTex->depth0, 183 oldTex->array_size, 184 oldTex->bind); 185 186 /* This will copy the old texture's base image into the new texture 187 * which we just allocated. 188 */ 189 st_finalize_texture(ctx, st->pipe, texObj); 190 191 /* release the old tex (will likely be freed too) */ 192 pipe_resource_reference(&oldTex, NULL); 193 pipe_sampler_view_reference(&stObj->sampler_view, NULL); 194 } 195 else { 196 /* Make sure that the base texture image data is present in the 197 * texture buffer. 198 */ 199 st_finalize_texture(ctx, st->pipe, texObj); 200 } 201 202 pt = stObj->pt; 203 204 assert(pt->last_level >= lastLevel); 205 206 /* Try to generate the mipmap by rendering/texturing. If that fails, 207 * use the software fallback. 208 */ 209 if (!st_render_mipmap(st, target, stObj, baseLevel, lastLevel)) { 210 /* since the util code actually also has a fallback, should 211 probably make it never fail and kill this */ 212 _mesa_generate_mipmap(ctx, target, texObj); 213 } 214 215 /* Fill in the Mesa gl_texture_image fields */ 216 for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) { 217 const uint srcLevel = dstLevel - 1; 218 const struct gl_texture_image *srcImage 219 = _mesa_get_tex_image(ctx, texObj, target, srcLevel); 220 struct gl_texture_image *dstImage; 221 struct st_texture_image *stImage; 222 uint border = srcImage->Border; 223 uint dstWidth, dstHeight, dstDepth; 224 225 dstWidth = u_minify(pt->width0, dstLevel); 226 if (texObj->Target == GL_TEXTURE_1D_ARRAY) { 227 dstHeight = pt->array_size; 228 } 229 else { 230 dstHeight = u_minify(pt->height0, dstLevel); 231 } 232 if (texObj->Target == GL_TEXTURE_2D_ARRAY) { 233 dstDepth = pt->array_size; 234 } 235 else { 236 dstDepth = u_minify(pt->depth0, dstLevel); 237 } 238 239 dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel); 240 if (!dstImage) { 241 _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps"); 242 return; 243 } 244 245 /* Free old image data */ 246 ctx->Driver.FreeTextureImageBuffer(ctx, dstImage); 247 248 /* initialize new image */ 249 _mesa_init_teximage_fields(ctx, dstImage, dstWidth, dstHeight, 250 dstDepth, border, srcImage->InternalFormat, 251 srcImage->TexFormat); 252 253 stImage = st_texture_image(dstImage); 254 255 pipe_resource_reference(&stImage->pt, pt); 256 } 257 } 258
