1/**************************************************************************
2 *
3 * Copyright 2003 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#include "main/mtypes.h"
29#include "main/enums.h"
30#include "main/image.h"
31#include "main/teximage.h"
32#include "main/texstate.h"
33#include "main/fbobject.h"
34
35#include "drivers/common/meta.h"
36
37#include "intel_screen.h"
38#include "intel_context.h"
39#include "intel_mipmap_tree.h"
40#include "intel_regions.h"
41#include "intel_fbo.h"
42#include "intel_tex.h"
43#include "intel_blit.h"
44
45#define FILE_DEBUG_FLAG DEBUG_TEXTURE
46
47
48bool
49intel_copy_texsubimage(struct intel_context *intel,
50                       struct intel_texture_image *intelImage,
51                       GLint dstx, GLint dsty,
52                       struct intel_renderbuffer *irb,
53                       GLint x, GLint y, GLsizei width, GLsizei height)
54{
55   struct gl_context *ctx = &intel->ctx;
56   struct intel_region *region;
57   const GLenum internalFormat = intelImage->base.Base.InternalFormat;
58   bool copy_supported = false;
59   bool copy_supported_with_alpha_override = false;
60
61   intel_prepare_render(intel);
62
63   if (!intelImage->mt || !irb || !irb->mt) {
64      if (unlikely(INTEL_DEBUG & DEBUG_PERF))
65	 fprintf(stderr, "%s fail %p %p (0x%08x)\n",
66		 __FUNCTION__, intelImage->mt, irb, internalFormat);
67      return false;
68   } else {
69      region = irb->mt->region;
70      assert(region);
71   }
72
73   copy_supported = intelImage->base.Base.TexFormat == intel_rb_format(irb);
74
75   /* Converting ARGB8888 to XRGB8888 is trivial: ignore the alpha bits */
76   if (intel_rb_format(irb) == MESA_FORMAT_ARGB8888 &&
77       intelImage->base.Base.TexFormat == MESA_FORMAT_XRGB8888) {
78      copy_supported = true;
79   }
80
81   /* Converting XRGB8888 to ARGB8888 requires setting the alpha bits to 1.0 */
82   if (intel_rb_format(irb) == MESA_FORMAT_XRGB8888 &&
83       intelImage->base.Base.TexFormat == MESA_FORMAT_ARGB8888) {
84      copy_supported_with_alpha_override = true;
85   }
86
87   if (!copy_supported && !copy_supported_with_alpha_override) {
88      if (unlikely(INTEL_DEBUG & DEBUG_PERF))
89	 fprintf(stderr, "%s mismatched formats %s, %s\n",
90		 __FUNCTION__,
91		 _mesa_get_format_name(intelImage->base.Base.TexFormat),
92		 _mesa_get_format_name(intel_rb_format(irb)));
93      return false;
94   }
95
96   {
97      GLuint image_x, image_y;
98      GLshort src_pitch;
99
100      /* get dest x/y in destination texture */
101      intel_miptree_get_image_offset(intelImage->mt,
102				     intelImage->base.Base.Level,
103				     intelImage->base.Base.Face,
104				     0,
105				     &image_x, &image_y);
106
107      /* The blitter can't handle Y-tiled buffers. */
108      if (intelImage->mt->region->tiling == I915_TILING_Y) {
109	 return false;
110      }
111
112      if (_mesa_is_winsys_fbo(ctx->ReadBuffer)) {
113	 /* Flip vertical orientation for system framebuffers */
114	 y = ctx->ReadBuffer->Height - (y + height);
115	 src_pitch = -region->pitch;
116      } else {
117	 /* reading from a FBO, y is already oriented the way we like */
118	 src_pitch = region->pitch;
119      }
120
121      /* blit from src buffer to texture */
122      if (!intelEmitCopyBlit(intel,
123			     intelImage->mt->cpp,
124			     src_pitch,
125			     region->bo,
126			     0,
127			     region->tiling,
128			     intelImage->mt->region->pitch,
129			     intelImage->mt->region->bo,
130			     0,
131			     intelImage->mt->region->tiling,
132			     irb->draw_x + x, irb->draw_y + y,
133			     image_x + dstx, image_y + dsty,
134			     width, height,
135			     GL_COPY)) {
136	 return false;
137      }
138   }
139
140   if (copy_supported_with_alpha_override)
141      intel_set_teximage_alpha_to_one(ctx, intelImage);
142
143   return true;
144}
145
146
147static void
148intelCopyTexSubImage(struct gl_context *ctx, GLuint dims,
149                     struct gl_texture_image *texImage,
150                     GLint xoffset, GLint yoffset, GLint zoffset,
151                     struct gl_renderbuffer *rb,
152                     GLint x, GLint y,
153                     GLsizei width, GLsizei height)
154{
155   if (dims == 3 || !intel_copy_texsubimage(intel_context(ctx),
156                               intel_texture_image(texImage),
157                               xoffset, yoffset,
158                               intel_renderbuffer(rb), x, y, width, height)) {
159      fallback_debug("%s - fallback to swrast\n", __FUNCTION__);
160      _mesa_meta_CopyTexSubImage(ctx, dims, texImage,
161                                 xoffset, yoffset, zoffset,
162                                 rb, x, y, width, height);
163   }
164}
165
166
167void
168intelInitTextureCopyImageFuncs(struct dd_function_table *functions)
169{
170   functions->CopyTexSubImage = intelCopyTexSubImage;
171}
172