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       DBG("%s fail %p %p\n", __FUNCTION__, intelImage->mt, src);
 102       return GL_FALSE;
 103    }
 104
 105    intelFlush(ctx);
 106    LOCK_HARDWARE(intel);
 107    {
 108       GLuint image_offset = intel_miptree_image_offset(intelImage->mt,
 109                                                        intelImage->face,
 110                                                        intelImage->level);
 111       const GLint orig_x = x;
 112       const GLint orig_y = y;
 113       const struct gl_framebuffer *fb = ctx->DrawBuffer;
 114
 115       if (_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, fb->_Xmax, fb->_Ymax,
 116                                &x, &y, &width, &height)) {
 117          GLshort src_pitch;
 118
 119          /* Update dst for clipped src.  Need to also clip the source rect.
 120           */
 121          dstx += x - orig_x;
 122          dsty += y - orig_y;
 123
 124          /* image_offset may be non-page-aligned, but that's illegal for tiling.
 125           */
 126          assert(intelImage->mt->region->tiling == I915_TILING_NONE);
 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          }
 143          else {
 144             /* reading from a FBO, y is already oriented the way we like */
 145             src_pitch = src->pitch;
 146          }
 147
 148          intelEmitCopyBlit(intel,
 149                            intelImage->mt->cpp,
 150                            src_pitch,
 151                            src->buffer,
 152                            0,
 153                            src->tiling,
 154                            intelImage->mt->pitch,
 155                            intelImage->mt->region->buffer,
 156                            image_offset,
 157                            intelImage->mt->region->tiling,
 158                            x, y, dstx, dsty, width, height,
 159                            GL_COPY);
 160       }
 161    }
 162
 163
 164    UNLOCK_HARDWARE(intel);
 165
 166    /* GL_SGIS_generate_mipmap */
 167    if (intelImage->level == texObj->BaseLevel && texObj->GenerateMipmap) {
 168       intel_generate_mipmap(ctx, target, texObj);
 169    }
 170
 171    return GL_TRUE;
 172 }
 173
 174
 175
 176
 177
 178 void
 179 intelCopyTexImage1D(GLcontext * ctx, GLenum target, GLint level,
 180                     GLenum internalFormat,
 181                     GLint x, GLint y, GLsizei width, GLint border)
 182 {
 183    struct gl_texture_unit *texUnit =
 184       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 185    struct gl_texture_object *texObj =
 186       _mesa_select_tex_object(ctx, texUnit, target);
 187    struct gl_texture_image *texImage =
 188       _mesa_select_tex_image(ctx, texObj, target, level);
 189
 190    if (border)
 191       goto fail;
 192
 193    /* Setup or redefine the texture object, mipmap tree and texture
 194     * image.  Don't populate yet.
 195     */
 196    ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
 197                           width, border,
 198                           GL_RGBA, CHAN_TYPE, NULL,
 199                           &ctx->DefaultPacking, texObj, texImage);
 200
 201    if (!do_copy_texsubimage(intel_context(ctx), target,
 202                             intel_texture_image(texImage),
 203                             internalFormat, 0, 0, x, y, width, 1))
 204       goto fail;
 205
 206    return;
 207
 208  fail:
 209    _swrast_copy_teximage1d(ctx, target, level, internalFormat, x, y,
 210                            width, border);
 211 }
 212
 213 void
 214 intelCopyTexImage2D(GLcontext * ctx, GLenum target, GLint level,
 215                     GLenum internalFormat,
 216                     GLint x, GLint y, GLsizei width, GLsizei height,
 217                     GLint border)
 218 {
 219    struct gl_texture_unit *texUnit =
 220       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 221    struct gl_texture_object *texObj =
 222       _mesa_select_tex_object(ctx, texUnit, target);
 223    struct gl_texture_image *texImage =
 224       _mesa_select_tex_image(ctx, texObj, target, level);
 225
 226    if (border)
 227       goto fail;
 228
 229    /* Setup or redefine the texture object, mipmap tree and texture
 230     * image.  Don't populate yet.
 231     */
 232    ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
 233                           width, height, border,
 234                           GL_RGBA, CHAN_TYPE, NULL,
 235                           &ctx->DefaultPacking, texObj, texImage);
 236
 237
 238    if (!do_copy_texsubimage(intel_context(ctx), target,
 239                             intel_texture_image(texImage),
 240                             internalFormat, 0, 0, x, y, width, height))
 241       goto fail;
 242
 243    return;
 244
 245  fail:
 246    _swrast_copy_teximage2d(ctx, target, level, internalFormat, x, y,
 247                            width, height, border);
 248 }
 249
 250
 251 void
 252 intelCopyTexSubImage1D(GLcontext * ctx, GLenum target, GLint level,
 253                        GLint xoffset, GLint x, GLint y, GLsizei width)
 254 {
 255    struct gl_texture_unit *texUnit =
 256       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 257    struct gl_texture_object *texObj =
 258       _mesa_select_tex_object(ctx, texUnit, target);
 259    struct gl_texture_image *texImage =
 260       _mesa_select_tex_image(ctx, texObj, target, level);
 261    GLenum internalFormat = texImage->InternalFormat;
 262
 263    /* XXX need to check <border> as in above function? */
 264
 265    /* Need to check texture is compatible with source format.
 266     */
 267
 268    if (!do_copy_texsubimage(intel_context(ctx), target,
 269                             intel_texture_image(texImage),
 270                             internalFormat, xoffset, 0, x, y, width, 1)) {
 271       _swrast_copy_texsubimage1d(ctx, target, level, xoffset, x, y, width);
 272    }
 273 }
 274
 275
 276
 277 void
 278 intelCopyTexSubImage2D(GLcontext * ctx, GLenum target, GLint level,
 279                        GLint xoffset, GLint yoffset,
 280                        GLint x, GLint y, GLsizei width, GLsizei height)
 281 {
 282    struct gl_texture_unit *texUnit =
 283       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 284    struct gl_texture_object *texObj =
 285       _mesa_select_tex_object(ctx, texUnit, target);
 286    struct gl_texture_image *texImage =
 287       _mesa_select_tex_image(ctx, texObj, target, level);
 288    GLenum internalFormat = texImage->InternalFormat;
 289
 290
 291    /* Need to check texture is compatible with source format.
 292     */
 293
 294    if (!do_copy_texsubimage(intel_context(ctx), target,
 295                             intel_texture_image(texImage),
 296                             internalFormat,
 297                             xoffset, yoffset, x, y, width, height)) {
 298
 299       DBG("%s - fallback to swrast\n", __FUNCTION__);
 300
 301       _swrast_copy_texsubimage2d(ctx, target, level,
 302                                  xoffset, yoffset, x, y, width, height);
 303    }
 304 }