src/mesa/drivers/dri/intel/intel_tex_copy.c

   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/mipmap.h"
  33 #include "swrast/swrast.h"
  34
  35 #include "intel_screen.h"
  36 #include "intel_context.h"
  37 #include "intel_batchbuffer.h"
  38 #include "intel_buffers.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 /**
  48  * Get the intel_region which is the source for any glCopyTex[Sub]Image call.
  49  *
  50  * Do the best we can using the blitter.  A future project is to use
  51  * the texture engine and fragment programs for these copies.
  52  */
  53 static const struct intel_region *
  54 get_teximage_source(struct intel_context *intel, GLenum internalFormat)
  55 {
  56    struct intel_renderbuffer *irb;
  57
  58    DBG("%s %s\n", __FUNCTION__,
  59        _mesa_lookup_enum_by_nr(internalFormat));
  60
  61    switch (internalFormat) {
  62    case GL_DEPTH_COMPONENT:
  63    case GL_DEPTH_COMPONENT16:
  64       irb = intel_get_renderbuffer(intel->ctx.ReadBuffer, BUFFER_DEPTH);
  65       if (irb && irb->region && irb->region->cpp == 2)
  66          return irb->region;
  67       return NULL;
  68    case GL_DEPTH24_STENCIL8_EXT:
  69    case GL_DEPTH_STENCIL_EXT:
  70       irb = intel_get_renderbuffer(intel->ctx.ReadBuffer, BUFFER_DEPTH);
  71       if (irb && irb->region && irb->region->cpp == 4)
  72          return irb->region;
  73       return NULL;
  74    case GL_RGBA:
  75    case GL_RGBA8:
  76       return intel_readbuf_region(intel);
  77    case GL_RGB:
  78       if (intel->ctx.Visual.rgbBits == 16)
  79          return intel_readbuf_region(intel);
  80       return NULL;
  81    default:
  82       return NULL;
  83    }
  84 }
  85
  86
  87 static GLboolean
  88 do_copy_texsubimage(struct intel_context *intel,
  89                     GLenum target,
  90                     struct intel_texture_image *intelImage,
  91                     GLenum internalFormat,
  92                     GLint dstx, GLint dsty,
  93                     GLint x, GLint y, GLsizei width, GLsizei height)
  94 {
  95    GLcontext *ctx = &intel->ctx;
  96    struct gl_texture_object *texObj = intelImage->base.TexObject;
  97    const struct intel_region *src =
  98       get_teximage_source(intel, internalFormat);
  99
 100    if (!intelImage->mt || !src) {
 101       if (INTEL_DEBUG & DEBUG_FALLBACKS)
 102          fprintf(stderr, "%s fail %p %p\n",
 103                  __FUNCTION__, intelImage->mt, src);
 104       return GL_FALSE;
 105    }
 106
 107    intelFlush(ctx);
 108    LOCK_HARDWARE(intel);
 109    {
 110       GLuint image_offset = intel_miptree_image_offset(intelImage->mt,
 111                                                        intelImage->face,
 112                                                        intelImage->level);
 113       const GLint orig_x = x;
 114       const GLint orig_y = y;
 115       GLshort src_pitch;
 116
 117       /* Update dst for clipped src.  Need to also clip the source rect. */
 118       dstx += x - orig_x;
 119       dsty += y - orig_y;
 120
 121       /* Can't blit to tiled buffers with non-tile-aligned offset. */
 122       if (intelImage->mt->region->tiling != I915_TILING_NONE &&
 123           (image_offset & 4095) != 0) {
 124          UNLOCK_HARDWARE(intel);
 125          return GL_FALSE;
 126       }
 127
 128       if (ctx->ReadBuffer->Name == 0) {
 129          /* reading from a window, adjust x, y */
 130          __DRIdrawablePrivate *dPriv = intel->driDrawable;
 131          y = dPriv->y + (dPriv->h - (y + height));
 132          x += dPriv->x;
 133
 134          /* Invert the data coming from the source rectangle due to GL
 135           * and hardware disagreeing on where y=0 is.
 136           *
 137           * It appears that our offsets and pitches get mangled
 138           * appropriately by the hardware, and we don't need to adjust them
 139           * on our own.
 140           */
 141          src_pitch = -src->pitch;
 142       } else {
 143          /* reading from a FBO, y is already oriented the way we like */
 144          src_pitch = src->pitch;
 145       }
 146
 147       intelEmitCopyBlit(intel,
 148                         intelImage->mt->cpp,
 149                         src_pitch,
 150                         src->buffer,
 151                         0,
 152                         src->tiling,
 153                         intelImage->mt->pitch,
 154                         intelImage->mt->region->buffer,
 155                         image_offset,
 156                         intelImage->mt->region->tiling,
 157                         x, y, dstx, dsty, width, height,
 158                         GL_COPY);
 159    }
 160
 161    UNLOCK_HARDWARE(intel);
 162
 163    /* GL_SGIS_generate_mipmap */
 164    if (intelImage->level == texObj->BaseLevel && texObj->GenerateMipmap) {
 165       intel_generate_mipmap(ctx, target, texObj);
 166    }
 167
 168    return GL_TRUE;
 169 }
 170
 171
 172 static void
 173 intelCopyTexImage1D(GLcontext * ctx, GLenum target, GLint level,
 174                     GLenum internalFormat,
 175                     GLint x, GLint y, GLsizei width, GLint border)
 176 {
 177    struct gl_texture_unit *texUnit =
 178       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 179    struct gl_texture_object *texObj =
 180       _mesa_select_tex_object(ctx, texUnit, target);
 181    struct gl_texture_image *texImage =
 182       _mesa_select_tex_image(ctx, texObj, target, level);
 183    int srcx, srcy, dstx, dsty, height;
 184
 185    if (border)
 186       goto fail;
 187
 188    /* Setup or redefine the texture object, mipmap tree and texture
 189     * image.  Don't populate yet.
 190     */
 191    ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
 192                           width, border,
 193                           GL_RGBA, CHAN_TYPE, NULL,
 194                           &ctx->DefaultPacking, texObj, texImage);
 195    srcx = x;
 196    srcy = y;
 197    dstx = 0;
 198    dsty = 0;
 199    height = 1;
 200    if (!_mesa_clip_copytexsubimage(ctx,
 201                                    &dstx, &dsty,
 202                                    &srcx, &srcy,
 203                                    &width, &height))
 204       return;
 205
 206    if (!do_copy_texsubimage(intel_context(ctx), target,
 207                             intel_texture_image(texImage),
 208                             internalFormat, 0, 0, x, y, width, height))
 209       goto fail;
 210
 211    return;
 212
 213  fail:
 214    _swrast_copy_teximage1d(ctx, target, level, internalFormat, x, y,
 215                            width, border);
 216 }
 217
 218
 219 static void
 220 intelCopyTexImage2D(GLcontext * ctx, GLenum target, GLint level,
 221                     GLenum internalFormat,
 222                     GLint x, GLint y, GLsizei width, GLsizei height,
 223                     GLint border)
 224 {
 225    struct gl_texture_unit *texUnit =
 226       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 227    struct gl_texture_object *texObj =
 228       _mesa_select_tex_object(ctx, texUnit, target);
 229    struct gl_texture_image *texImage =
 230       _mesa_select_tex_image(ctx, texObj, target, level);
 231    int srcx, srcy, dstx, dsty;
 232
 233    if (border)
 234       goto fail;
 235
 236    /* Setup or redefine the texture object, mipmap tree and texture
 237     * image.  Don't populate yet.
 238     */
 239    ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
 240                           width, height, border,
 241                           GL_RGBA, CHAN_TYPE, NULL,
 242                           &ctx->DefaultPacking, texObj, texImage);
 243
 244    srcx = x;
 245    srcy = y;
 246    dstx = 0;
 247    dsty = 0;
 248    if (!_mesa_clip_copytexsubimage(ctx,
 249                                    &dstx, &dsty,
 250                                    &srcx, &srcy,
 251                                    &width, &height))
 252       return;
 253
 254    if (!do_copy_texsubimage(intel_context(ctx), target,
 255                             intel_texture_image(texImage),
 256                             internalFormat, 0, 0, x, y, width, height))
 257       goto fail;
 258
 259    return;
 260
 261  fail:
 262    _swrast_copy_teximage2d(ctx, target, level, internalFormat, x, y,
 263                            width, height, border);
 264 }
 265
 266
 267 static void
 268 intelCopyTexSubImage1D(GLcontext * ctx, GLenum target, GLint level,
 269                        GLint xoffset, GLint x, GLint y, GLsizei width)
 270 {
 271    struct gl_texture_unit *texUnit =
 272       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 273    struct gl_texture_object *texObj =
 274       _mesa_select_tex_object(ctx, texUnit, target);
 275    struct gl_texture_image *texImage =
 276       _mesa_select_tex_image(ctx, texObj, target, level);
 277    GLenum internalFormat = texImage->InternalFormat;
 278
 279    /* XXX need to check <border> as in above function? */
 280
 281    /* Need to check texture is compatible with source format.
 282     */
 283
 284    if (!do_copy_texsubimage(intel_context(ctx), target,
 285                             intel_texture_image(texImage),
 286                             internalFormat, xoffset, 0, x, y, width, 1)) {
 287       _swrast_copy_texsubimage1d(ctx, target, level, xoffset, x, y, width);
 288    }
 289 }
 290
 291
 292 static void
 293 intelCopyTexSubImage2D(GLcontext * ctx, GLenum target, GLint level,
 294                        GLint xoffset, GLint yoffset,
 295                        GLint x, GLint y, GLsizei width, GLsizei height)
 296 {
 297    struct gl_texture_unit *texUnit =
 298       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 299    struct gl_texture_object *texObj =
 300       _mesa_select_tex_object(ctx, texUnit, target);
 301    struct gl_texture_image *texImage =
 302       _mesa_select_tex_image(ctx, texObj, target, level);
 303    GLenum internalFormat = texImage->InternalFormat;
 304
 305    /* Need to check texture is compatible with source format.
 306     */
 307
 308    if (!do_copy_texsubimage(intel_context(ctx), target,
 309                             intel_texture_image(texImage),
 310                             internalFormat,
 311                             xoffset, yoffset, x, y, width, height)) {
 312
 313       DBG("%s - fallback to swrast\n", __FUNCTION__);
 314
 315       _swrast_copy_texsubimage2d(ctx, target, level,
 316                                  xoffset, yoffset, x, y, width, height);
 317    }
 318 }
 319
 320
 321 void
 322 intelInitTextureCopyImageFuncs(struct dd_function_table *functions)
 323 {
 324    functions->CopyTexImage1D = intelCopyTexImage1D;
 325    functions->CopyTexImage2D = intelCopyTexImage2D;
 326    functions->CopyTexSubImage1D = intelCopyTexSubImage1D;
 327    functions->CopyTexSubImage2D = intelCopyTexSubImage2D;
 328 }