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-rw-r--r--mesalib/src/mesa/main/genmipmap.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/genmipmap.c b/mesalib/src/mesa/main/genmipmap.c
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+++ b/mesalib/src/mesa/main/genmipmap.c
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+/*
+ * 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);
+}