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			@@ -1,495 +0,0 @@ | 
		
		
	
		
			
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			/* | 
		
		
	
		
			
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			 * Mesa 3-D graphics library | 
		
		
	
		
			
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			 * | 
		
		
	
		
			
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			 * Copyright (C) 2015 Intel Corporation.  All Rights Reserved. | 
		
		
	
		
			
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			 * | 
		
		
	
		
			
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			 * Permission is hereby granted, free of charge, to any person obtaining a | 
		
		
	
		
			
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			 * copy of this software and associated documentation files (the "Software"), | 
		
		
	
		
			
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			 * to deal in the Software without restriction, including without limitation | 
		
		
	
		
			
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			 * the rights to use, copy, modify, merge, publish, distribute, sublicense, | 
		
		
	
		
			
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			 * and/or sell copies of the Software, and to permit persons to whom the | 
		
		
	
		
			
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			 * Software is furnished to do so, subject to the following conditions: | 
		
		
	
		
			
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			 * | 
		
		
	
		
			
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			 * The above copyright notice and this permission notice shall be included | 
		
		
	
		
			
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			 * in all copies or substantial portions of the Software. | 
		
		
	
		
			
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			 * | 
		
		
	
		
			
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			 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | 
		
		
	
		
			
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			 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | 
		
		
	
		
			
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			 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL | 
		
		
	
		
			
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			 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | 
		
		
	
		
			
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			 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | 
		
		
	
		
			
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			 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | 
		
		
	
		
			
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			 * OTHER DEALINGS IN THE SOFTWARE. | 
		
		
	
		
			
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			 * | 
		
		
	
		
			
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			 * Authors: | 
		
		
	
		
			
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			 *    Jason Ekstrand <jason.ekstrand@intel.com> | 
		
		
	
		
			
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			 */ | 
		
		
	
		
			
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			#include "blend.h" | 
		
		
	
		
			
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			#include "bufferobj.h" | 
		
		
	
		
			
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			#include "buffers.h" | 
		
		
	
		
			
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			#include "clear.h" | 
		
		
	
		
			
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			#include "fbobject.h" | 
		
		
	
		
			
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			#include "framebuffer.h" | 
		
		
	
		
			
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			#include "glformats.h" | 
		
		
	
		
			
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			#include "glheader.h" | 
		
		
	
		
			
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			#include "image.h" | 
		
		
	
		
			
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			#include "macros.h" | 
		
		
	
		
			
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			#include "meta.h" | 
		
		
	
		
			
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			#include "pbo.h" | 
		
		
	
		
			
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			#include "readpix.h" | 
		
		
	
		
			
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			#include "shaderapi.h" | 
		
		
	
		
			
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			#include "state.h" | 
		
		
	
		
			
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			#include "teximage.h" | 
		
		
	
		
			
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			#include "texobj.h" | 
		
		
	
		
			
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			#include "texstate.h" | 
		
		
	
		
			
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			#include "uniforms.h" | 
		
		
	
		
			
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			#include "varray.h" | 
		
		
	
		
			
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			static bool | 
		
		
	
		
			
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			need_signed_unsigned_int_conversion(mesa_format mesaFormat, | 
		
		
	
		
			
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			                                    GLenum format, GLenum type) | 
		
		
	
		
			
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			{ | 
		
		
	
		
			
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			   const GLenum mesaFormatType = _mesa_get_format_datatype(mesaFormat); | 
		
		
	
		
			
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			   const bool is_format_integer = _mesa_is_enum_format_integer(format); | 
		
		
	
		
			
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			   return (mesaFormatType == GL_INT && | 
		
		
	
		
			
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			           is_format_integer && | 
		
		
	
		
			
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			           (type == GL_UNSIGNED_INT || | 
		
		
	
		
			
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			            type == GL_UNSIGNED_SHORT || | 
		
		
	
		
			
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			            type == GL_UNSIGNED_BYTE)) || | 
		
		
	
		
			
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			          (mesaFormatType == GL_UNSIGNED_INT && | 
		
		
	
		
			
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			           is_format_integer && | 
		
		
	
		
			
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			           (type == GL_INT || | 
		
		
	
		
			
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			            type == GL_SHORT || | 
		
		
	
		
			
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			            type == GL_BYTE)); | 
		
		
	
		
			
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			} | 
		
		
	
		
			
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			static struct gl_texture_image * | 
		
		
	
		
			
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			create_texture_for_pbo(struct gl_context *ctx, | 
		
		
	
		
			
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			                       bool create_pbo, GLenum pbo_target, | 
		
		
	
		
			
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			                       int dims, int width, int height, int depth, | 
		
		
	
		
			
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			                       GLenum format, GLenum type, const void *pixels, | 
		
		
	
		
			
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			                       const struct gl_pixelstore_attrib *packing, | 
		
		
	
		
			
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			                       struct gl_buffer_object **tmp_pbo, GLuint *tmp_tex) | 
		
		
	
		
			
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			{ | 
		
		
	
		
			
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			   const mesa_format pbo_format = | 
		
		
	
		
			
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			      _mesa_tex_format_from_format_and_type(ctx, format, type); | 
		
		
	
		
			
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			   GLenum internal_format; | 
		
		
	
		
			
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			   unsigned row_stride; | 
		
		
	
		
			
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			   struct gl_buffer_object *buffer_obj; | 
		
		
	
		
			
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			   struct gl_texture_object *tex_obj; | 
		
		
	
		
			
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			   struct gl_texture_image *tex_image; | 
		
		
	
		
			
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			   bool read_only; | 
		
		
	
		
			
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			   if (packing->SwapBytes || | 
		
		
	
		
			
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			       packing->LsbFirst || | 
		
		
	
		
			
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			       packing->Invert) | 
		
		
	
		
			
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			      return NULL; | 
		
		
	
		
			
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			   if (pbo_format == MESA_FORMAT_NONE) | 
		
		
	
		
			
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			      return NULL; | 
		
		
	
		
			
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			   /* Account for SKIP_PIXELS, SKIP_ROWS, ALIGNMENT, and SKIP_IMAGES */ | 
		
		
	
		
			
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			   uint32_t first_pixel = _mesa_image_offset(dims, packing, width, height, | 
		
		
	
		
			
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			                                             format, type, | 
		
		
	
		
			
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			                                             0, 0, 0); | 
		
		
	
		
			
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			   uint32_t last_pixel =  _mesa_image_offset(dims, packing, width, height, | 
		
		
	
		
			
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			                                             format, type, | 
		
		
	
		
			
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			                                             depth-1, height-1, width); | 
		
		
	
		
			
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			   row_stride = _mesa_image_row_stride(packing, width, format, type); | 
		
		
	
		
			
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			   if (_mesa_is_bufferobj(packing->BufferObj)) { | 
		
		
	
		
			
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			      *tmp_pbo = NULL; | 
		
		
	
		
			
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			      buffer_obj = packing->BufferObj; | 
		
		
	
		
			
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			      first_pixel += (intptr_t)pixels; | 
		
		
	
		
			
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			   } else { | 
		
		
	
		
			
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			      bool is_pixel_pack = pbo_target == GL_PIXEL_PACK_BUFFER; | 
		
		
	
		
			
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			      assert(create_pbo); | 
		
		
	
		
			
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			      *tmp_pbo = ctx->Driver.NewBufferObject(ctx, 0xDEADBEEF); | 
		
		
	
		
			
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			      if (*tmp_pbo == NULL) | 
		
		
	
		
			
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			         return NULL; | 
		
		
	
		
			
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			      /* In case of GL_PIXEL_PACK_BUFFER, pass null pointer for the pixel | 
		
		
	
		
			
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			       * data to avoid unnecessary data copying in _mesa_buffer_data. | 
		
		
	
		
			
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			       */ | 
		
		
	
		
			
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			      if (is_pixel_pack) | 
		
		
	
		
			
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			         _mesa_buffer_data(ctx, *tmp_pbo, GL_NONE, | 
		
		
	
		
			
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			                           last_pixel - first_pixel, | 
		
		
	
		
			
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			                           NULL, | 
		
		
	
		
			
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			                           GL_STREAM_READ, | 
		
		
	
		
			
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			                           __func__); | 
		
		
	
		
			
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			      else | 
		
		
	
		
			
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			         _mesa_buffer_data(ctx, *tmp_pbo, GL_NONE, | 
		
		
	
		
			
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			                           last_pixel - first_pixel, | 
		
		
	
		
			
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			                           (char *)pixels + first_pixel, | 
		
		
	
		
			
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			                           GL_STREAM_DRAW, | 
		
		
	
		
			
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			                           __func__); | 
		
		
	
		
			
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			      buffer_obj = *tmp_pbo; | 
		
		
	
		
			
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			      first_pixel = 0; | 
		
		
	
		
			
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			   } | 
		
		
	
		
			
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			   _mesa_GenTextures(1, tmp_tex); | 
		
		
	
		
			
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			   tex_obj = _mesa_lookup_texture(ctx, *tmp_tex); | 
		
		
	
		
			
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			   _mesa_initialize_texture_object(ctx, tex_obj, *tmp_tex, GL_TEXTURE_2D); | 
		
		
	
		
			
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			   /* This must be set after _mesa_initialize_texture_object, not before. */ | 
		
		
	
		
			
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			   tex_obj->Immutable = GL_TRUE; | 
		
		
	
		
			
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			   tex_obj->ImmutableLevels = 1; | 
		
		
	
		
			
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			   /* This is required for interactions with ARB_texture_view. */ | 
		
		
	
		
			
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			   tex_obj->NumLayers = 1; | 
		
		
	
		
			
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			   internal_format = _mesa_get_format_base_format(pbo_format); | 
		
		
	
		
			
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			   /* The texture is addressed as a single very-tall image, so we | 
		
		
	
		
			
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			    * need to pack the multiple image depths together taking the | 
		
		
	
		
			
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			    * inter-image padding into account. | 
		
		
	
		
			
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			    */ | 
		
		
	
		
			
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			   int image_height = packing->ImageHeight == 0 ? height : packing->ImageHeight; | 
		
		
	
		
			
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			   int full_height = image_height * (depth - 1) + height; | 
		
		
	
		
			
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			   tex_image = _mesa_get_tex_image(ctx, tex_obj, tex_obj->Target, 0); | 
		
		
	
		
			
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			   _mesa_init_teximage_fields(ctx, tex_image, width, full_height, 1, | 
		
		
	
		
			
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			                              0, internal_format, pbo_format); | 
		
		
	
		
			
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			   read_only = pbo_target == GL_PIXEL_UNPACK_BUFFER; | 
		
		
	
		
			
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			   if (!ctx->Driver.SetTextureStorageForBufferObject(ctx, tex_obj, | 
		
		
	
		
			
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			                                                     buffer_obj, | 
		
		
	
		
			
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			                                                     first_pixel, | 
		
		
	
		
			
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			                                                     row_stride, | 
		
		
	
		
			
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			                                                     read_only)) { | 
		
		
	
		
			
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			      _mesa_DeleteTextures(1, tmp_tex); | 
		
		
	
		
			
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			      _mesa_reference_buffer_object(ctx, tmp_pbo, NULL); | 
		
		
	
		
			
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			      return NULL; | 
		
		
	
		
			
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			   } | 
		
		
	
		
			
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			   return tex_image; | 
		
		
	
		
			
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			} | 
		
		
	
		
			
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			bool | 
		
		
	
		
			
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			_mesa_meta_pbo_TexSubImage(struct gl_context *ctx, GLuint dims, | 
		
		
	
		
			
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			                           struct gl_texture_image *tex_image, | 
		
		
	
		
			
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			                           int xoffset, int yoffset, int zoffset, | 
		
		
	
		
			
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			                           int width, int height, int depth, | 
		
		
	
		
			
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			                           GLenum format, GLenum type, const void *pixels, | 
		
		
	
		
			
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			                           bool create_pbo, | 
		
		
	
		
			
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			                           const struct gl_pixelstore_attrib *packing) | 
		
		
	
		
			
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			{ | 
		
		
	
		
			
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			   struct gl_buffer_object *pbo = NULL; | 
		
		
	
		
			
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			   GLuint pbo_tex = 0; | 
		
		
	
		
			
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			   struct gl_framebuffer *readFb = NULL; | 
		
		
	
		
			
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			   struct gl_framebuffer *drawFb = NULL; | 
		
		
	
		
			
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			   int image_height; | 
		
		
	
		
			
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			   struct gl_texture_image *pbo_tex_image; | 
		
		
	
		
			
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			   GLenum status; | 
		
		
	
		
			
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			   bool success = false; | 
		
		
	
		
			
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			   int z; | 
		
		
	
		
			
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			   if (!_mesa_is_bufferobj(packing->BufferObj) && | 
		
		
	
		
			
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			       (!create_pbo || pixels == NULL)) | 
		
		
	
		
			
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			      return false; | 
		
		
	
		
			
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			   if (format == GL_DEPTH_COMPONENT || | 
		
		
	
		
			
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			       format == GL_DEPTH_STENCIL || | 
		
		
	
		
			
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			       format == GL_STENCIL_INDEX || | 
		
		
	
		
			
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			       format == GL_COLOR_INDEX) | 
		
		
	
		
			
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			      return false; | 
		
		
	
		
			
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			   if (ctx->_ImageTransferState) | 
		
		
	
		
			
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			      return false; | 
		
		
	
		
			
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			   /* This function rely on BlitFramebuffer to fill in the pixel data for | 
		
		
	
		
			
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			    * glTex[Sub]Image*D. But, BlitFrameBuffer doesn't support signed to | 
		
		
	
		
			
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			    * unsigned or unsigned to signed integer conversions. | 
		
		
	
		
			
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			    */ | 
		
		
	
		
			
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			   if (need_signed_unsigned_int_conversion(tex_image->TexFormat, format, type)) | 
		
		
	
		
			
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			      return false; | 
		
		
	
		
			
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			   /* For arrays, use a tall (height * depth) 2D texture but taking into | 
		
		
	
		
			
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			    * account the inter-image padding specified with the image height packing | 
		
		
	
		
			
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			    * property. | 
		
		
	
		
			
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			    */ | 
		
		
	
		
			
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			   image_height = packing->ImageHeight == 0 ? height : packing->ImageHeight; | 
		
		
	
		
			
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			   _mesa_meta_begin(ctx, ~(MESA_META_PIXEL_TRANSFER | | 
		
		
	
		
			
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			                           MESA_META_PIXEL_STORE)); | 
		
		
	
		
			
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			   pbo_tex_image = create_texture_for_pbo(ctx, create_pbo, | 
		
		
	
		
			
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			                                          GL_PIXEL_UNPACK_BUFFER, | 
		
		
	
		
			
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			                                          dims, width, height, depth, | 
		
		
	
		
			
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			                                          format, type, pixels, packing, | 
		
		
	
		
			
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			                                          &pbo, &pbo_tex); | 
		
		
	
		
			
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			   if (!pbo_tex_image) { | 
		
		
	
		
			
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			      _mesa_meta_end(ctx); | 
		
		
	
		
			
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			      return false; | 
		
		
	
		
			
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			   } | 
		
		
	
		
			
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			   readFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF); | 
		
		
	
		
			
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			   if (readFb == NULL) | 
		
		
	
		
			
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			      goto fail; | 
		
		
	
		
			
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			   drawFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF); | 
		
		
	
		
			
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			   if (drawFb == NULL) | 
		
		
	
		
			
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			      goto fail; | 
		
		
	
		
			
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			   _mesa_bind_framebuffers(ctx, drawFb, readFb); | 
		
		
	
		
			
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  | 
		
		
	
		
			
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			   if (tex_image->TexObject->Target == GL_TEXTURE_1D_ARRAY) { | 
		
		
	
		
			
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			      assert(depth == 1); | 
		
		
	
		
			
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			      assert(zoffset == 0); | 
		
		
	
		
			
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			      depth = height; | 
		
		
	
		
			
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			      height = 1; | 
		
		
	
		
			
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			      image_height = 1; | 
		
		
	
		
			
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			      zoffset = yoffset; | 
		
		
	
		
			
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			 | 
			      yoffset = 0; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_meta_framebuffer_texture_image(ctx, ctx->ReadBuffer, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                        GL_COLOR_ATTACHMENT0, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                        pbo_tex_image, 0); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* If this passes on the first layer it should pass on the others */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   status = _mesa_check_framebuffer_status(ctx, ctx->ReadBuffer); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (status != GL_FRAMEBUFFER_COMPLETE) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      goto fail; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                        GL_COLOR_ATTACHMENT0, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                        tex_image, zoffset); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* If this passes on the first layer it should pass on the others */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   status = _mesa_check_framebuffer_status(ctx, ctx->DrawBuffer); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (status != GL_FRAMEBUFFER_COMPLETE) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      goto fail; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* Explicitly disable sRGB encoding */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   ctx->DrawBuffer->Visual.sRGBCapable = false; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_update_state(ctx); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (_mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                  0, 0, width, height, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                  xoffset, yoffset, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                  xoffset + width, yoffset + height, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                  GL_COLOR_BUFFER_BIT, GL_NEAREST)) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      goto fail; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   for (z = 1; z < depth; z++) { | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                           GL_COLOR_ATTACHMENT0, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                           tex_image, zoffset + z); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_update_state(ctx); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                 0, z * image_height, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                 width, z * image_height + height, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                 xoffset, yoffset, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                 xoffset + width, yoffset + height, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                 GL_COLOR_BUFFER_BIT, GL_NEAREST); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   success = true; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			fail: | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_reference_framebuffer(&readFb, NULL); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_reference_framebuffer(&drawFb, NULL); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_DeleteTextures(1, &pbo_tex); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_reference_buffer_object(ctx, &pbo, NULL); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_meta_end(ctx); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   return success; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			} | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			bool | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			_mesa_meta_pbo_GetTexSubImage(struct gl_context *ctx, GLuint dims, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                              struct gl_texture_image *tex_image, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                              int xoffset, int yoffset, int zoffset, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                              int width, int height, int depth, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                              GLenum format, GLenum type, const void *pixels, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                              const struct gl_pixelstore_attrib *packing) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			{ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   struct gl_buffer_object *pbo = NULL; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   GLuint pbo_tex = 0; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   struct gl_framebuffer *readFb; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   struct gl_framebuffer *drawFb; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   int image_height; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   struct gl_texture_image *pbo_tex_image; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   struct gl_renderbuffer *rb = NULL; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   GLenum dstBaseFormat = _mesa_unpack_format_to_base_format(format); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   GLenum status, src_base_format; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   bool success = false, clear_channels_to_zero = false; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   float save_clear_color[4]; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   int z; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (!_mesa_is_bufferobj(packing->BufferObj)) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      return false; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (format == GL_DEPTH_COMPONENT || | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			       format == GL_DEPTH_STENCIL || | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			       format == GL_STENCIL_INDEX || | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			       format == GL_COLOR_INDEX) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      return false; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* Don't use meta path for readpixels in below conditions. */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (!tex_image) { | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      rb = ctx->ReadBuffer->_ColorReadBuffer; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      /* _mesa_get_readpixels_transfer_ops() includes the cases of read | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			       * color clamping along with the ctx->_ImageTransferState. | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			       */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      if (_mesa_get_readpixels_transfer_ops(ctx, rb->Format, format, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                            type, GL_FALSE)) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			         return false; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      if (_mesa_need_rgb_to_luminance_conversion(rb->_BaseFormat, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                                 dstBaseFormat)) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			         return false; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      /* This function rely on BlitFramebuffer to fill in the pixel data for | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			       * ReadPixels. But, BlitFrameBuffer doesn't support signed to unsigned | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			       * or unsigned to signed integer conversions. OpenGL spec expects an | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			       * invalid operation in that case. | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			       */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      if (need_signed_unsigned_int_conversion(rb->Format, format, type)) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			         return false; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } else { | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      if (need_signed_unsigned_int_conversion(tex_image->TexFormat, format, type)) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			         return false; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* For arrays, use a tall (height * depth) 2D texture but taking into | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			    * account the inter-image padding specified with the image height packing | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			    * property. | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			    */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   image_height = packing->ImageHeight == 0 ? height : packing->ImageHeight; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_meta_begin(ctx, ~(MESA_META_PIXEL_TRANSFER | | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                           MESA_META_PIXEL_STORE)); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   pbo_tex_image = create_texture_for_pbo(ctx, false, GL_PIXEL_PACK_BUFFER, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                          dims, width, height, depth, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                          format, type, pixels, packing, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                          &pbo, &pbo_tex); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (!pbo_tex_image) { | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_meta_end(ctx); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      return false; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* GL_CLAMP_FRAGMENT_COLOR doesn't affect ReadPixels and GettexImage */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (ctx->Extensions.ARB_color_buffer_float) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_ClampColor(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   readFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (readFb == NULL) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      goto fail; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   drawFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (drawFb == NULL) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      goto fail; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (tex_image && tex_image->TexObject->Target == GL_TEXTURE_1D_ARRAY) { | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      assert(depth == 1); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      assert(zoffset == 0); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      depth = height; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      height = 1; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      image_height = 1; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      zoffset = yoffset; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      yoffset = 0; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* If we were given a texture, bind it to the read framebuffer.  If not, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			    * we're doing a ReadPixels and we should just use whatever framebuffer | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			    * the client has bound. | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			    */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_bind_framebuffers(ctx, drawFb, tex_image ? readFb : ctx->ReadBuffer); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (tex_image) { | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_meta_framebuffer_texture_image(ctx, ctx->ReadBuffer, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                           GL_COLOR_ATTACHMENT0, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                           tex_image, zoffset); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      /* If this passes on the first layer it should pass on the others */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      status = _mesa_check_framebuffer_status(ctx, ctx->ReadBuffer); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      if (status != GL_FRAMEBUFFER_COMPLETE) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			         goto fail; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } else { | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      assert(depth == 1); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                        GL_COLOR_ATTACHMENT0, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                        pbo_tex_image, 0); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* If this passes on the first layer it should pass on the others */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   status = _mesa_check_framebuffer_status(ctx, ctx->DrawBuffer); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (status != GL_FRAMEBUFFER_COMPLETE) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      goto fail; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* Explicitly disable sRGB encoding */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   ctx->DrawBuffer->Visual.sRGBCapable = false; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_update_state(ctx); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (_mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                  xoffset, yoffset, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                  xoffset + width, yoffset + height, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                  0, 0, width, height, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                  GL_COLOR_BUFFER_BIT, GL_NEAREST)) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      goto fail; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   src_base_format = tex_image ? | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                     tex_image->_BaseFormat : | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                     ctx->ReadBuffer->_ColorReadBuffer->_BaseFormat; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* Depending on the base formats involved we might need to rebase some | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			    * values. For example if we download from a Luminance format to RGBA | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			    * format, we want G=0 and B=0. | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			    */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   clear_channels_to_zero = | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_need_luminance_to_rgb_conversion(src_base_format, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                             pbo_tex_image->_BaseFormat); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (clear_channels_to_zero) { | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      memcpy(save_clear_color, ctx->Color.ClearColor.f, 4 * sizeof(float)); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      /* Clear the Green, Blue channels. */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_ColorMask(GL_FALSE, GL_TRUE, GL_TRUE, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                      src_base_format != GL_LUMINANCE_ALPHA); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_ClearColor(0.0, 0.0, 0.0, 1.0); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_Clear(GL_COLOR_BUFFER_BIT); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   for (z = 1; z < depth; z++) { | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_meta_framebuffer_texture_image(ctx, ctx->ReadBuffer, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                           GL_COLOR_ATTACHMENT0, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                           tex_image, zoffset + z); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_update_state(ctx); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                 xoffset, yoffset, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                 xoffset + width, yoffset + height, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                 0, z * image_height, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                 width, z * image_height + height, | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                                 GL_COLOR_BUFFER_BIT, GL_NEAREST); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      if (clear_channels_to_zero) | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			         _mesa_Clear(GL_COLOR_BUFFER_BIT); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   /* Unmask the color channels and restore the saved clear color values. */ | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   if (clear_channels_to_zero) { | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			      _mesa_ClearColor(save_clear_color[0], save_clear_color[1], | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			                       save_clear_color[2], save_clear_color[3]); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   } | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   success = true; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			fail: | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_reference_framebuffer(&drawFb, NULL); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_reference_framebuffer(&readFb, NULL); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_DeleteTextures(1, &pbo_tex); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_reference_buffer_object(ctx, &pbo, NULL); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   _mesa_meta_end(ctx); | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			
  | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			   return success; | 
		
		
	
		
			
			 | 
			 | 
			
			 | 
			} |