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       const struct gl_framebuffer *fb = ctx->DrawBuffer;
 116
 117       if (_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, fb->_Xmax, fb->_Ymax,
 118                                &x, &y, &width, &height)) {
 119          GLshort src_pitch;
 120
 121          /* Update dst for clipped src.  Need to also clip the source rect.
 122           */
 123          dstx += x - orig_x;
 124          dsty += y - orig_y;
 125
 126          /* image_offset may be non-page-aligned, but that's illegal for tiling.
 127           */
 128          assert(intelImage->mt->region->tiling == I915_TILING_NONE);
 129
 130          if (ctx->ReadBuffer->Name == 0) {
 131             /* reading from a window, adjust x, y */
 132             __DRIdrawablePrivate *dPriv = intel->driDrawable;
 133             y = dPriv->y + (dPriv->h - (y + height));
 134             x += dPriv->x;
 135
 136             /* Invert the data coming from the source rectangle due to GL
 137              * and hardware disagreeing on where y=0 is.
 138              *
 139              * It appears that our offsets and pitches get mangled
 140              * appropriately by the hardware, and we don't need to adjust them
 141              * on our own.
 142              */
 143             src_pitch = -src->pitch;
 144          }
 145          else {
 146             /* reading from a FBO, y is already oriented the way we like */
 147             src_pitch = src->pitch;
 148          }
 149
 150          intelEmitCopyBlit(intel,
 151                            intelImage->mt->cpp,
 152                            src_pitch,
 153                            src->buffer,
 154                            0,
 155                            src->tiling,
 156                            intelImage->mt->pitch,
 157                            intelImage->mt->region->buffer,
 158                            image_offset,
 159                            intelImage->mt->region->tiling,
 160                            x, y, dstx, dsty, width, height,
 161                            GL_COPY);
 162       }
 163    }
 164
 165
 166    UNLOCK_HARDWARE(intel);
 167
 168    /* GL_SGIS_generate_mipmap */
 169    if (intelImage->level == texObj->BaseLevel && texObj->GenerateMipmap) {
 170       intel_generate_mipmap(ctx, target, texObj);
 171    }
 172
 173    return GL_TRUE;
 174 }
 175
 176
 177
 178
 179
 180 void
 181 intelCopyTexImage1D(GLcontext * ctx, GLenum target, GLint level,
 182                     GLenum internalFormat,
 183                     GLint x, GLint y, GLsizei width, GLint border)
 184 {
 185    struct gl_texture_unit *texUnit =
 186       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 187    struct gl_texture_object *texObj =
 188       _mesa_select_tex_object(ctx, texUnit, target);
 189    struct gl_texture_image *texImage =
 190       _mesa_select_tex_image(ctx, texObj, target, level);
 191
 192    if (border)
 193       goto fail;
 194
 195    /* Setup or redefine the texture object, mipmap tree and texture
 196     * image.  Don't populate yet.
 197     */
 198    ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
 199                           width, border,
 200                           GL_RGBA, CHAN_TYPE, NULL,
 201                           &ctx->DefaultPacking, texObj, texImage);
 202
 203    if (!do_copy_texsubimage(intel_context(ctx), target,
 204                             intel_texture_image(texImage),
 205                             internalFormat, 0, 0, x, y, width, 1))
 206       goto fail;
 207
 208    return;
 209
 210  fail:
 211    _swrast_copy_teximage1d(ctx, target, level, internalFormat, x, y,
 212                            width, border);
 213 }
 214
 215 void
 216 intelCopyTexImage2D(GLcontext * ctx, GLenum target, GLint level,
 217                     GLenum internalFormat,
 218                     GLint x, GLint y, GLsizei width, GLsizei height,
 219                     GLint border)
 220 {
 221    struct gl_texture_unit *texUnit =
 222       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 223    struct gl_texture_object *texObj =
 224       _mesa_select_tex_object(ctx, texUnit, target);
 225    struct gl_texture_image *texImage =
 226       _mesa_select_tex_image(ctx, texObj, target, level);
 227
 228    if (border)
 229       goto fail;
 230
 231    /* Setup or redefine the texture object, mipmap tree and texture
 232     * image.  Don't populate yet.
 233     */
 234    ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
 235                           width, height, border,
 236                           GL_RGBA, CHAN_TYPE, NULL,
 237                           &ctx->DefaultPacking, texObj, texImage);
 238
 239
 240    if (!do_copy_texsubimage(intel_context(ctx), target,
 241                             intel_texture_image(texImage),
 242                             internalFormat, 0, 0, x, y, width, height))
 243       goto fail;
 244
 245    return;
 246
 247  fail:
 248    _swrast_copy_teximage2d(ctx, target, level, internalFormat, x, y,
 249                            width, height, border);
 250 }
 251
 252
 253 void
 254 intelCopyTexSubImage1D(GLcontext * ctx, GLenum target, GLint level,
 255                        GLint xoffset, GLint x, GLint y, GLsizei width)
 256 {
 257    struct gl_texture_unit *texUnit =
 258       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 259    struct gl_texture_object *texObj =
 260       _mesa_select_tex_object(ctx, texUnit, target);
 261    struct gl_texture_image *texImage =
 262       _mesa_select_tex_image(ctx, texObj, target, level);
 263    GLenum internalFormat = texImage->InternalFormat;
 264
 265    /* XXX need to check <border> as in above function? */
 266
 267    /* Need to check texture is compatible with source format.
 268     */
 269
 270    if (!do_copy_texsubimage(intel_context(ctx), target,
 271                             intel_texture_image(texImage),
 272                             internalFormat, xoffset, 0, x, y, width, 1)) {
 273       _swrast_copy_texsubimage1d(ctx, target, level, xoffset, x, y, width);
 274    }
 275 }
 276
 277
 278
 279 void
 280 intelCopyTexSubImage2D(GLcontext * ctx, GLenum target, GLint level,
 281                        GLint xoffset, GLint yoffset,
 282                        GLint x, GLint y, GLsizei width, GLsizei height)
 283 {
 284    struct gl_texture_unit *texUnit =
 285       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 286    struct gl_texture_object *texObj =
 287       _mesa_select_tex_object(ctx, texUnit, target);
 288    struct gl_texture_image *texImage =
 289       _mesa_select_tex_image(ctx, texObj, target, level);
 290    GLenum internalFormat = texImage->InternalFormat;
 291
 292
 293    /* Need to check texture is compatible with source format.
 294     */
 295
 296    if (!do_copy_texsubimage(intel_context(ctx), target,
 297                             intel_texture_image(texImage),
 298                             internalFormat,
 299                             xoffset, yoffset, x, y, width, height)) {
 300
 301       DBG("%s - fallback to swrast\n", __FUNCTION__);
 302
 303       _swrast_copy_texsubimage2d(ctx, target, level,
 304                                  xoffset, yoffset, x, y, width, height);
 305    }
 306 }