src/mesa/drivers/common/meta_copy_image.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2014 Intel Corporation.  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 "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include "glheader.h"
  26 #include "context.h"
  27 #include "enums.h"
  28 #include "imports.h"
  29 #include "macros.h"
  30 #include "teximage.h"
  31 #include "texobj.h"
  32 #include "fbobject.h"
  33 #include "buffers.h"
  34 #include "state.h"
  35 #include "mtypes.h"
  36 #include "meta.h"
  37
  38 /* This function makes a texture view without bothering with all of the API
  39  * checks.  Most of them are the same for CopyTexSubImage so checking would
  40  * be redundant.  The one major difference is that we don't check for
  41  * whether the texture is immutable or not.  However, since the view will
  42  * be created and then immediately destroyed, this should not be a problem.
  43  */
  44 static bool
  45 make_view(struct gl_context *ctx, struct gl_texture_image *tex_image,
  46           struct gl_texture_image **view_tex_image, GLuint *view_tex_name,
  47           GLenum internal_format)
  48 {
  49    struct gl_texture_object *tex_obj = tex_image->TexObject;
  50    struct gl_texture_object *view_tex_obj;
  51    mesa_format tex_format;
  52
  53    /* Set up the new texture object */
  54    _mesa_GenTextures(1, view_tex_name);
  55    view_tex_obj = _mesa_lookup_texture(ctx, *view_tex_name);
  56    if (!view_tex_obj)
  57       return false;
  58
  59    tex_format = _mesa_choose_texture_format(ctx, view_tex_obj, tex_obj->Target,
  60                                            0, internal_format,
  61                                            GL_NONE, GL_NONE);
  62
  63    if (!ctx->Driver.TestProxyTexImage(ctx, tex_obj->Target, 0, tex_format,
  64                                       tex_image->Width, tex_image->Height,
  65                                       tex_image->Depth, 0)) {
  66       return false;
  67    }
  68
  69    view_tex_obj->Target = tex_obj->Target;
  70
  71    *view_tex_image = _mesa_get_tex_image(ctx, view_tex_obj, tex_obj->Target, 0);
  72    _mesa_init_teximage_fields(ctx, *view_tex_image,
  73                               tex_image->Width, tex_image->Height,
  74                               tex_image->Depth,
  75                               0, internal_format, tex_format);
  76
  77    view_tex_obj->MinLevel = tex_image->Level;
  78    view_tex_obj->NumLevels = 1;
  79    view_tex_obj->MinLayer = tex_obj->MinLayer;
  80    view_tex_obj->NumLayers = tex_obj->NumLayers;
  81    view_tex_obj->Immutable = tex_obj->Immutable;
  82    view_tex_obj->ImmutableLevels = tex_obj->ImmutableLevels;
  83    view_tex_obj->Target = tex_obj->Target;
  84
  85    if (ctx->Driver.TextureView != NULL &&
  86        !ctx->Driver.TextureView(ctx, view_tex_obj, tex_obj)) {
  87       _mesa_DeleteTextures(1, view_tex_name);
  88       *view_tex_name = 0;
  89       return false; /* driver recorded error */
  90    }
  91
  92    return true;
  93 }
  94
  95 /** A partial implementation of glCopyImageSubData
  96  *
  97  * This is a partial implementation of glCopyImageSubData that works only
  98  * if both textures are uncompressed and the destination texture is
  99  * renderable.  It uses a slight abuse of a texture view (see make_view) to
 100  * turn the source texture into the destination texture type and then uses
 101  * _mesa_meta_BlitFramebuffers to do the copy.
 102  */
 103 bool
 104 _mesa_meta_CopyImageSubData_uncompressed(struct gl_context *ctx,
 105                                          struct gl_texture_image *src_tex_image,
 106                                          int src_x, int src_y, int src_z,
 107                                          struct gl_texture_image *dst_tex_image,
 108                                          int dst_x, int dst_y, int dst_z,
 109                                          int src_width, int src_height)
 110 {
 111    GLuint src_view_texture = 0;
 112    struct gl_texture_image *src_view_tex_image;
 113    GLuint fbos[2];
 114    bool success = false;
 115    GLbitfield mask;
 116    GLenum status, attachment;
 117
 118    if (_mesa_is_format_compressed(dst_tex_image->TexFormat))
 119       return false;
 120
 121    if (_mesa_is_format_compressed(src_tex_image->TexFormat))
 122       return false;
 123
 124    if (src_tex_image->InternalFormat == dst_tex_image->InternalFormat) {
 125       src_view_tex_image = src_tex_image;
 126    } else {
 127       if (!make_view(ctx, src_tex_image, &src_view_tex_image, &src_view_texture,
 128                      dst_tex_image->InternalFormat))
 129          goto cleanup;
 130    }
 131
 132    /* We really only need to stash the bound framebuffers. */
 133    _mesa_meta_begin(ctx, 0);
 134
 135    _mesa_GenFramebuffers(2, fbos);
 136    _mesa_BindFramebuffer(GL_READ_FRAMEBUFFER, fbos[0]);
 137    _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, fbos[1]);
 138
 139    switch (_mesa_get_format_base_format(src_tex_image->TexFormat)) {
 140    case GL_DEPTH_COMPONENT:
 141       attachment = GL_DEPTH_ATTACHMENT;
 142       mask = GL_DEPTH_BUFFER_BIT;
 143       break;
 144    case GL_DEPTH_STENCIL:
 145       attachment = GL_DEPTH_STENCIL_ATTACHMENT;
 146       mask = GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;
 147       break;
 148    case GL_STENCIL_INDEX:
 149       attachment = GL_STENCIL_ATTACHMENT;
 150       mask = GL_STENCIL_BUFFER_BIT;
 151       break;
 152    default:
 153       attachment = GL_COLOR_ATTACHMENT0;
 154       mask = GL_COLOR_BUFFER_BIT;
 155       _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0);
 156       _mesa_ReadBuffer(GL_COLOR_ATTACHMENT0);
 157    }
 158
 159    _mesa_meta_bind_fbo_image(GL_READ_FRAMEBUFFER, attachment,
 160                              src_view_tex_image, src_z);
 161
 162    status = _mesa_CheckFramebufferStatus(GL_READ_FRAMEBUFFER);
 163    if (status != GL_FRAMEBUFFER_COMPLETE)
 164       goto meta_end;
 165
 166    _mesa_meta_bind_fbo_image(GL_DRAW_FRAMEBUFFER, attachment,
 167                              dst_tex_image, dst_z);
 168
 169    status = _mesa_CheckFramebufferStatus(GL_DRAW_FRAMEBUFFER);
 170    if (status != GL_FRAMEBUFFER_COMPLETE)
 171       goto meta_end;
 172
 173    /* Since we've bound a new draw framebuffer, we need to update its
 174     * derived state -- _Xmin, etc -- for BlitFramebuffer's clipping to
 175     * be correct.
 176     */
 177    _mesa_update_state(ctx);
 178
 179    /* We skip the core BlitFramebuffer checks for format consistency.
 180     * We have already created views to ensure that the texture formats
 181     * match.
 182     */
 183    ctx->Driver.BlitFramebuffer(ctx, src_x, src_y,
 184                                src_x + src_width, src_y + src_height,
 185                                dst_x, dst_y,
 186                                dst_x + src_width, dst_y + src_height,
 187                                mask, GL_NEAREST);
 188
 189    success = true;
 190
 191 meta_end:
 192    _mesa_DeleteFramebuffers(2, fbos);
 193    _mesa_meta_end(ctx);
 194
 195 cleanup:
 196    _mesa_DeleteTextures(1, &src_view_texture);
 197
 198    return success;
 199 }