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 /**
  39  * Create a texture image that wraps a renderbuffer.
  40  */
  41 static struct gl_texture_image *
  42 wrap_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
  43 {
  44    GLenum texTarget;
  45    struct gl_texture_object *texObj;
  46    struct gl_texture_image *texImage;
  47
  48    if (rb->NumSamples > 1)
  49       texTarget = GL_TEXTURE_2D_MULTISAMPLE;
  50    else
  51       texTarget = GL_TEXTURE_2D;
  52
  53    /* Texture ID is not significant since it never goes into the hash table */
  54    texObj = ctx->Driver.NewTextureObject(ctx, 0, texTarget);
  55    assert(texObj);
  56    if (!texObj)
  57       return NULL;
  58
  59    texImage = _mesa_get_tex_image(ctx, texObj, texTarget, 0);
  60    assert(texImage);
  61    if (!texImage)
  62       return NULL;
  63
  64    if (!ctx->Driver.BindRenderbufferTexImage(ctx, rb, texImage)) {
  65       _mesa_problem(ctx, "Failed to create texture from renderbuffer");
  66       return NULL;
  67    }
  68
  69    if (ctx->Driver.FinishRenderTexture && !rb->NeedsFinishRenderTexture) {
  70       rb->NeedsFinishRenderTexture = true;
  71       ctx->Driver.FinishRenderTexture(ctx, rb);
  72    }
  73
  74    return texImage;
  75 }
  76
  77
  78 /* This function makes a texture view without bothering with all of the API
  79  * checks.  Most of them are the same for CopyTexSubImage so checking would
  80  * be redundant.  The one major difference is that we don't check for
  81  * whether the texture is immutable or not.  However, since the view will
  82  * be created and then immediately destroyed, this should not be a problem.
  83  */
  84 static bool
  85 make_view(struct gl_context *ctx, struct gl_texture_image *tex_image,
  86           struct gl_texture_image **view_tex_image, GLuint *view_tex_name,
  87           GLenum internal_format)
  88 {
  89    struct gl_texture_object *tex_obj = tex_image->TexObject;
  90    struct gl_texture_object *view_tex_obj;
  91    mesa_format tex_format;
  92
  93    /* Set up the new texture object */
  94    _mesa_GenTextures(1, view_tex_name);
  95    view_tex_obj = _mesa_lookup_texture(ctx, *view_tex_name);
  96    if (!view_tex_obj)
  97       return false;
  98
  99    tex_format = _mesa_choose_texture_format(ctx, view_tex_obj, tex_obj->Target,
 100                                            0, internal_format,
 101                                            GL_NONE, GL_NONE);
 102
 103    if (!ctx->Driver.TestProxyTexImage(ctx, tex_obj->Target, 0, tex_format,
 104                                       tex_image->Width, tex_image->Height,
 105                                       tex_image->Depth, 0)) {
 106       _mesa_DeleteTextures(1, view_tex_name);
 107       *view_tex_name = 0;
 108       return false;
 109    }
 110
 111    assert(tex_obj->Target != 0);
 112    assert(tex_obj->TargetIndex < NUM_TEXTURE_TARGETS);
 113
 114    view_tex_obj->Target = tex_obj->Target;
 115    view_tex_obj->TargetIndex = tex_obj->TargetIndex;
 116
 117    *view_tex_image = _mesa_get_tex_image(ctx, view_tex_obj, tex_obj->Target, 0);
 118
 119    if (!*view_tex_image) {
 120       _mesa_DeleteTextures(1, view_tex_name);
 121       *view_tex_name = 0;
 122       return false;
 123    }
 124
 125    _mesa_init_teximage_fields(ctx, *view_tex_image,
 126                               tex_image->Width, tex_image->Height,
 127                               tex_image->Depth,
 128                               0, internal_format, tex_format);
 129
 130    view_tex_obj->MinLevel = tex_image->Level;
 131    view_tex_obj->NumLevels = 1;
 132    view_tex_obj->MinLayer = tex_obj->MinLayer;
 133    view_tex_obj->NumLayers = tex_obj->NumLayers;
 134    view_tex_obj->Immutable = tex_obj->Immutable;
 135    view_tex_obj->ImmutableLevels = tex_obj->ImmutableLevels;
 136
 137    if (ctx->Driver.TextureView != NULL &&
 138        !ctx->Driver.TextureView(ctx, view_tex_obj, tex_obj)) {
 139       _mesa_DeleteTextures(1, view_tex_name);
 140       *view_tex_name = 0;
 141       return false; /* driver recorded error */
 142    }
 143
 144    return true;
 145 }
 146
 147 /** A partial implementation of glCopyImageSubData
 148  *
 149  * This is a partial implementation of glCopyImageSubData that works only
 150  * if both textures are uncompressed and the destination texture is
 151  * renderable.  It uses a slight abuse of a texture view (see make_view) to
 152  * turn the source texture into the destination texture type and then uses
 153  * _mesa_meta_BlitFramebuffers to do the copy.
 154  */
 155 bool
 156 _mesa_meta_CopyImageSubData_uncompressed(struct gl_context *ctx,
 157                                          struct gl_texture_image *src_tex_image,
 158                                          struct gl_renderbuffer *src_renderbuffer,
 159                                          int src_x, int src_y, int src_z,
 160                                          struct gl_texture_image *dst_tex_image,
 161                                          struct gl_renderbuffer *dst_renderbuffer,
 162                                          int dst_x, int dst_y, int dst_z,
 163                                          int src_width, int src_height)
 164 {
 165    mesa_format src_format, dst_format;
 166    GLint src_internal_format, dst_internal_format;
 167    GLuint src_view_texture = 0;
 168    struct gl_texture_image *src_view_tex_image;
 169    GLuint fbos[2];
 170    bool success = false;
 171    GLbitfield mask;
 172    GLenum status, attachment;
 173
 174    if (src_renderbuffer) {
 175       src_format = src_renderbuffer->Format;
 176       src_internal_format = src_renderbuffer->InternalFormat;
 177    } else {
 178       assert(src_tex_image);
 179       src_format = src_tex_image->TexFormat;
 180       src_internal_format = src_tex_image->InternalFormat;
 181    }
 182
 183    if (dst_renderbuffer) {
 184       dst_format = dst_renderbuffer->Format;
 185       dst_internal_format = dst_renderbuffer->InternalFormat;
 186    } else {
 187       assert(dst_tex_image);
 188       dst_format = dst_tex_image->TexFormat;
 189       dst_internal_format = dst_tex_image->InternalFormat;
 190    }
 191
 192    if (_mesa_is_format_compressed(src_format))
 193       return false;
 194
 195    if (_mesa_is_format_compressed(dst_format))
 196       return false;
 197
 198    if (src_internal_format == dst_internal_format) {
 199       src_view_tex_image = src_tex_image;
 200    } else {
 201       if (src_renderbuffer) {
 202          assert(src_tex_image == NULL);
 203          src_tex_image = wrap_renderbuffer(ctx, src_renderbuffer);
 204       }
 205       if (!make_view(ctx, src_tex_image, &src_view_tex_image, &src_view_texture,
 206                      dst_tex_image->InternalFormat))
 207          goto cleanup;
 208    }
 209
 210    /* We really only need to stash the bound framebuffers and scissor. */
 211    _mesa_meta_begin(ctx, MESA_META_SCISSOR);
 212
 213    _mesa_GenFramebuffers(2, fbos);
 214    _mesa_BindFramebuffer(GL_READ_FRAMEBUFFER, fbos[0]);
 215    _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, fbos[1]);
 216
 217    switch (_mesa_get_format_base_format(src_format)) {
 218    case GL_DEPTH_COMPONENT:
 219       attachment = GL_DEPTH_ATTACHMENT;
 220       mask = GL_DEPTH_BUFFER_BIT;
 221       break;
 222    case GL_DEPTH_STENCIL:
 223       attachment = GL_DEPTH_STENCIL_ATTACHMENT;
 224       mask = GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;
 225       break;
 226    case GL_STENCIL_INDEX:
 227       attachment = GL_STENCIL_ATTACHMENT;
 228       mask = GL_STENCIL_BUFFER_BIT;
 229       break;
 230    default:
 231       attachment = GL_COLOR_ATTACHMENT0;
 232       mask = GL_COLOR_BUFFER_BIT;
 233       _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0);
 234       _mesa_ReadBuffer(GL_COLOR_ATTACHMENT0);
 235    }
 236
 237    if (src_view_tex_image) {
 238       /* Prever the tex image because, even if we have a renderbuffer, we may
 239        * have had to wrap it in a texture view.
 240        */
 241       _mesa_meta_bind_fbo_image(GL_READ_FRAMEBUFFER, attachment,
 242                                 src_view_tex_image, src_z);
 243    } else {
 244       _mesa_FramebufferRenderbuffer(GL_READ_FRAMEBUFFER,
 245                                     attachment,
 246                                     GL_RENDERBUFFER,
 247                                     src_renderbuffer->Name);
 248    }
 249
 250    status = _mesa_CheckFramebufferStatus(GL_READ_FRAMEBUFFER);
 251    if (status != GL_FRAMEBUFFER_COMPLETE)
 252       goto meta_end;
 253
 254    if (dst_renderbuffer) {
 255       _mesa_FramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER,
 256                                     attachment,
 257                                     GL_RENDERBUFFER,
 258                                     dst_renderbuffer->Name);
 259    } else {
 260       _mesa_meta_bind_fbo_image(GL_DRAW_FRAMEBUFFER, attachment,
 261                                 dst_tex_image, dst_z);
 262    }
 263
 264    status = _mesa_CheckFramebufferStatus(GL_DRAW_FRAMEBUFFER);
 265    if (status != GL_FRAMEBUFFER_COMPLETE)
 266       goto meta_end;
 267
 268    /* Since we've bound a new draw framebuffer, we need to update its
 269     * derived state -- _Xmin, etc -- for BlitFramebuffer's clipping to
 270     * be correct.
 271     */
 272    _mesa_update_state(ctx);
 273
 274    /* We skip the core BlitFramebuffer checks for format consistency.
 275     * We have already created views to ensure that the texture formats
 276     * match.
 277     */
 278    ctx->Driver.BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer,
 279                                src_x, src_y,
 280                                src_x + src_width, src_y + src_height,
 281                                dst_x, dst_y,
 282                                dst_x + src_width, dst_y + src_height,
 283                                mask, GL_NEAREST);
 284
 285    success = true;
 286
 287 meta_end:
 288    _mesa_DeleteFramebuffers(2, fbos);
 289    _mesa_meta_end(ctx);
 290
 291 cleanup:
 292    _mesa_DeleteTextures(1, &src_view_texture);
 293
 294    /* If we got a renderbuffer source, delete the temporary texture */
 295    if (src_renderbuffer && src_tex_image)
 296       ctx->Driver.DeleteTexture(ctx, src_tex_image->TexObject);
 297
 298    return success;
 299 }