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Diffstat (limited to 'src/mesa/main/genmipmap.c')
-rw-r--r-- | src/mesa/main/genmipmap.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/mesa/main/genmipmap.c b/src/mesa/main/genmipmap.c new file mode 100644 index 0000000..dcd482d --- /dev/null +++ b/src/mesa/main/genmipmap.c @@ -0,0 +1,131 @@ +/* + * Mesa 3-D graphics library + * + * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2013 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, sublicense, + * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS 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. + */ + + +/* + * glGenerateMipmap function + */ + +#include "context.h" +#include "enums.h" +#include "genmipmap.h" +#include "glformats.h" +#include "macros.h" +#include "mtypes.h" +#include "teximage.h" +#include "texobj.h" + + +/** + * Generate all the mipmap levels below the base level. + * Note: this GL function would be more useful if one could specify a + * cube face, a set of array slices, etc. + */ +void GLAPIENTRY +_mesa_GenerateMipmap(GLenum target) +{ + struct gl_texture_image *srcImage; + struct gl_texture_object *texObj; + GLboolean error; + + GET_CURRENT_CONTEXT(ctx); + + FLUSH_VERTICES(ctx, 0); + + switch (target) { + case GL_TEXTURE_1D: + error = _mesa_is_gles(ctx); + break; + case GL_TEXTURE_2D: + error = GL_FALSE; + break; + case GL_TEXTURE_3D: + error = ctx->API == API_OPENGLES; + break; + case GL_TEXTURE_CUBE_MAP: + error = !ctx->Extensions.ARB_texture_cube_map; + break; + case GL_TEXTURE_1D_ARRAY: + error = _mesa_is_gles(ctx) || !ctx->Extensions.EXT_texture_array; + break; + case GL_TEXTURE_2D_ARRAY: + error = (_mesa_is_gles(ctx) && ctx->Version < 30) + || !ctx->Extensions.EXT_texture_array; + break; + default: + error = GL_TRUE; + } + + if (error) { + _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target=%s)", + _mesa_lookup_enum_by_nr(target)); + return; + } + + texObj = _mesa_get_current_tex_object(ctx, target); + + if (texObj->BaseLevel >= texObj->MaxLevel) { + /* nothing to do */ + return; + } + + if (texObj->Target == GL_TEXTURE_CUBE_MAP && + !_mesa_cube_complete(texObj)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGenerateMipmap(incomplete cube map)"); + return; + } + + _mesa_lock_texture(ctx, texObj); + + srcImage = _mesa_select_tex_image(ctx, texObj, target, texObj->BaseLevel); + if (!srcImage) { + _mesa_unlock_texture(ctx, texObj); + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGenerateMipmap(zero size base image)"); + return; + } + + if (_mesa_is_enum_format_integer(srcImage->InternalFormat) || + _mesa_is_depthstencil_format(srcImage->InternalFormat) || + _mesa_is_stencil_format(srcImage->InternalFormat)) { + _mesa_unlock_texture(ctx, texObj); + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGenerateMipmap(invalid internal format)"); + return; + } + + if (target == GL_TEXTURE_CUBE_MAP) { + GLuint face; + for (face = 0; face < 6; face++) + ctx->Driver.GenerateMipmap(ctx, + GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face, + texObj); + } + else { + ctx->Driver.GenerateMipmap(ctx, target, texObj); + } + _mesa_unlock_texture(ctx, texObj); +} |