1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (C) 1999-2013 VMware, Inc. All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27 /*
28 * glGenerateMipmap function
29 */
30
31 #include "context.h"
32 #include "enums.h"
33 #include "genmipmap.h"
34 #include "glformats.h"
35 #include "macros.h"
36 #include "mtypes.h"
37 #include "teximage.h"
38 #include "texobj.h"
39 #include "hash.h"
40
41 bool
_mesa_is_valid_generate_texture_mipmap_target(struct gl_context * ctx,GLenum target)42 _mesa_is_valid_generate_texture_mipmap_target(struct gl_context *ctx,
43 GLenum target)
44 {
45 bool error;
46
47 switch (target) {
48 case GL_TEXTURE_1D:
49 error = _mesa_is_gles(ctx);
50 break;
51 case GL_TEXTURE_2D:
52 error = false;
53 break;
54 case GL_TEXTURE_3D:
55 error = ctx->API == API_OPENGLES;
56 break;
57 case GL_TEXTURE_CUBE_MAP:
58 error = !ctx->Extensions.ARB_texture_cube_map;
59 break;
60 case GL_TEXTURE_1D_ARRAY:
61 error = _mesa_is_gles(ctx) || !ctx->Extensions.EXT_texture_array;
62 break;
63 case GL_TEXTURE_2D_ARRAY:
64 error = (_mesa_is_gles(ctx) && ctx->Version < 30)
65 || !ctx->Extensions.EXT_texture_array;
66 break;
67 case GL_TEXTURE_CUBE_MAP_ARRAY:
68 error = !_mesa_has_texture_cube_map_array(ctx);
69 break;
70 default:
71 error = true;
72 }
73
74 return !error;
75 }
76
77 bool
_mesa_is_valid_generate_texture_mipmap_internalformat(struct gl_context * ctx,GLenum internalformat)78 _mesa_is_valid_generate_texture_mipmap_internalformat(struct gl_context *ctx,
79 GLenum internalformat)
80 {
81 if (_mesa_is_gles3(ctx)) {
82 /* From the ES 3.2 specification's description of GenerateMipmap():
83 * "An INVALID_OPERATION error is generated if the levelbase array was
84 * not specified with an unsized internal format from table 8.3 or a
85 * sized internal format that is both color-renderable and
86 * texture-filterable according to table 8.10."
87 *
88 * GL_EXT_texture_format_BGRA8888 adds a GL_BGRA_EXT unsized internal
89 * format, and includes it in a very similar looking table. So we
90 * include it here as well.
91 */
92 return internalformat == GL_RGBA || internalformat == GL_RGB ||
93 internalformat == GL_LUMINANCE_ALPHA ||
94 internalformat == GL_LUMINANCE || internalformat == GL_ALPHA ||
95 internalformat == GL_BGRA_EXT ||
96 (_mesa_is_es3_color_renderable(internalformat) &&
97 _mesa_is_es3_texture_filterable(ctx, internalformat));
98 }
99
100 return (!_mesa_is_enum_format_integer(internalformat) &&
101 !_mesa_is_depthstencil_format(internalformat) &&
102 !_mesa_is_astc_format(internalformat) &&
103 !_mesa_is_stencil_format(internalformat));
104 }
105
106 /**
107 * Implements glGenerateMipmap and glGenerateTextureMipmap.
108 * Generates all the mipmap levels below the base level.
109 */
110 void
_mesa_generate_texture_mipmap(struct gl_context * ctx,struct gl_texture_object * texObj,GLenum target,bool dsa)111 _mesa_generate_texture_mipmap(struct gl_context *ctx,
112 struct gl_texture_object *texObj, GLenum target,
113 bool dsa)
114 {
115 struct gl_texture_image *srcImage;
116 const char *suffix = dsa ? "Texture" : "";
117
118 FLUSH_VERTICES(ctx, 0);
119
120 if (texObj->BaseLevel >= texObj->MaxLevel) {
121 /* nothing to do */
122 return;
123 }
124
125 if (texObj->Target == GL_TEXTURE_CUBE_MAP &&
126 !_mesa_cube_complete(texObj)) {
127 _mesa_error(ctx, GL_INVALID_OPERATION,
128 "glGenerate%sMipmap(incomplete cube map)", suffix);
129 return;
130 }
131
132 _mesa_lock_texture(ctx, texObj);
133
134 srcImage = _mesa_select_tex_image(texObj, target, texObj->BaseLevel);
135 if (!srcImage) {
136 _mesa_unlock_texture(ctx, texObj);
137 _mesa_error(ctx, GL_INVALID_OPERATION,
138 "glGenerate%sMipmap(zero size base image)", suffix);
139 return;
140 }
141
142 if (!_mesa_is_valid_generate_texture_mipmap_internalformat(ctx,
143 srcImage->InternalFormat)) {
144 _mesa_unlock_texture(ctx, texObj);
145 _mesa_error(ctx, GL_INVALID_OPERATION,
146 "glGenerate%sMipmap(invalid internal format %s)", suffix,
147 _mesa_enum_to_string(srcImage->InternalFormat));
148 return;
149 }
150
151 if (srcImage->Width == 0 || srcImage->Height == 0) {
152 _mesa_unlock_texture(ctx, texObj);
153 return;
154 }
155
156 if (target == GL_TEXTURE_CUBE_MAP) {
157 GLuint face;
158 for (face = 0; face < 6; face++) {
159 ctx->Driver.GenerateMipmap(ctx,
160 GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, texObj);
161 }
162 }
163 else {
164 ctx->Driver.GenerateMipmap(ctx, target, texObj);
165 }
166 _mesa_unlock_texture(ctx, texObj);
167 }
168
169 /**
170 * Generate all the mipmap levels below the base level.
171 * Note: this GL function would be more useful if one could specify a
172 * cube face, a set of array slices, etc.
173 */
174 void GLAPIENTRY
_mesa_GenerateMipmap(GLenum target)175 _mesa_GenerateMipmap(GLenum target)
176 {
177 struct gl_texture_object *texObj;
178 GET_CURRENT_CONTEXT(ctx);
179
180 if (!_mesa_is_valid_generate_texture_mipmap_target(ctx, target)) {
181 _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmap(target=%s)",
182 _mesa_enum_to_string(target));
183 return;
184 }
185
186 texObj = _mesa_get_current_tex_object(ctx, target);
187 if (!texObj)
188 return;
189
190 _mesa_generate_texture_mipmap(ctx, texObj, target, false);
191 }
192
193 /**
194 * Generate all the mipmap levels below the base level.
195 */
196 void GLAPIENTRY
_mesa_GenerateTextureMipmap(GLuint texture)197 _mesa_GenerateTextureMipmap(GLuint texture)
198 {
199 struct gl_texture_object *texObj;
200 GET_CURRENT_CONTEXT(ctx);
201
202 texObj = _mesa_lookup_texture_err(ctx, texture, "glGenerateTextureMipmap");
203 if (!texObj)
204 return;
205
206 if (!_mesa_is_valid_generate_texture_mipmap_target(ctx, texObj->Target)) {
207 _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateTextureMipmap(target=%s)",
208 _mesa_enum_to_string(texObj->Target));
209 return;
210 }
211
212 _mesa_generate_texture_mipmap(ctx, texObj, texObj->Target, true);
213 }
214