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 "mtypes.h"
  29 #include "enums.h"
  30 #include "image.h"
  31 #include "teximage.h"
  32 #include "swrast/swrast.h"
  33
  34 #include "intel_screen.h"
  35 #include "intel_context.h"
  36 #include "intel_batchbuffer.h"
  37 #include "intel_buffers.h"
  38 #include "intel_mipmap_tree.h"
  39 #include "intel_regions.h"
  40 #include "intel_fbo.h"
  41 #include "intel_tex.h"
  42 #include "intel_blit.h"
  43
  44 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  45
  46 /**
  47  * Get the intel_region which is the source for any glCopyTex[Sub]Image call.
  48  *
  49  * Do the best we can using the blitter.  A future project is to use
  50  * the texture engine and fragment programs for these copies.
  51  */
  52 static const struct intel_region *
  53 get_teximage_source(struct intel_context *intel, GLenum internalFormat)
  54 {
  55    struct intel_renderbuffer *irb;
  56
  57    DBG("%s %s\n", __FUNCTION__,
  58        _mesa_lookup_enum_by_nr(internalFormat));
  59
  60    switch (internalFormat) {
  61    case GL_DEPTH_COMPONENT:
  62    case GL_DEPTH_COMPONENT16_ARB:
  63       irb = intel_get_renderbuffer(intel->ctx.ReadBuffer, BUFFER_DEPTH);
  64       if (irb && irb->region && irb->region->cpp == 2)
  65          return irb->region;
  66       return NULL;
  67    case GL_DEPTH24_STENCIL8_EXT:
  68    case GL_DEPTH_STENCIL_EXT:
  69       irb = intel_get_renderbuffer(intel->ctx.ReadBuffer, BUFFER_DEPTH);
  70       if (irb && irb->region && irb->region->cpp == 4)
  71          return irb->region;
  72       return NULL;
  73    case GL_RGBA:
  74    case GL_RGBA8:
  75       return intel_readbuf_region(intel);
  76    case GL_RGB:
  77       if (intel->intelScreen->cpp == 2)
  78          return intel_readbuf_region(intel);
  79       return NULL;
  80    default:
  81       return NULL;
  82    }
  83 }
  84
  85
  86 static GLboolean
  87 do_copy_texsubimage(struct intel_context *intel,
  88                     struct intel_texture_image *intelImage,
  89                     GLenum internalFormat,
  90                     GLint dstx, GLint dsty,
  91                     GLint x, GLint y, GLsizei width, GLsizei height)
  92 {
  93    GLcontext *ctx = &intel->ctx;
  94    const struct intel_region *src =
  95       get_teximage_source(intel, internalFormat);
  96
  97    if (!intelImage->mt || !src) {
  98       DBG("%s fail %p %p\n", __FUNCTION__, intelImage->mt, src);
  99       return GL_FALSE;
 100    }
 101
 102    intelFlush(ctx);
 103    LOCK_HARDWARE(intel);
 104    {
 105       GLuint image_offset = intel_miptree_image_offset(intelImage->mt,
 106                                                        intelImage->face,
 107                                                        intelImage->level);
 108       const GLint orig_x = x;
 109       const GLint orig_y = y;
 110       const struct gl_framebuffer *fb = ctx->DrawBuffer;
 111
 112       if (_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, fb->_Xmax, fb->_Ymax,
 113                                &x, &y, &width, &height)) {
 114          /* Update dst for clipped src.  Need to also clip the source rect.
 115           */
 116          dstx += x - orig_x;
 117          dsty += y - orig_y;
 118
 119          if (ctx->ReadBuffer->Name == 0) {
 120             /* reading from a window, adjust x, y */
 121             __DRIdrawablePrivate *dPriv = intel->driDrawable;
 122             GLuint window_y;
 123             /* window_y = position of window on screen if y=0=bottom */
 124             window_y = intel->intelScreen->height - (dPriv->y + dPriv->h);
 125             y = window_y + y;
 126             x += dPriv->x;
 127          }
 128          else {
 129             /* reading from a FBO */
 130             /* invert Y */
 131             y = ctx->ReadBuffer->Height - y - 1;
 132          }
 133
 134
 135          /* A bit of fiddling to get the blitter to work with -ve
 136           * pitches.  But we get a nice inverted blit this way, so it's
 137           * worth it:
 138           */
 139          intelEmitCopyBlit(intel,
 140                            intelImage->mt->cpp,
 141                            -src->pitch,
 142                            src->buffer,
 143                            src->height * src->pitch * src->cpp,
 144                            GL_FALSE,
 145                            intelImage->mt->pitch,
 146                            intelImage->mt->region->buffer,
 147                            image_offset,
 148                            intelImage->mt->region->tiled,
 149                            x, y + height, dstx, dsty, width, height,
 150                            GL_COPY); /* ? */
 151
 152          intel_batchbuffer_flush(intel->batch);
 153       }
 154    }
 155
 156
 157    UNLOCK_HARDWARE(intel);
 158
 159 #if 0
 160    /* GL_SGIS_generate_mipmap -- this can be accelerated now.
 161     * XXX Add a ctx->Driver.GenerateMipmaps() function?
 162     */
 163    if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
 164       intel_generate_mipmap(ctx, target,
 165                             &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
 166                             texObj);
 167    }
 168 #endif
 169
 170    return GL_TRUE;
 171 }
 172
 173
 174
 175
 176
 177 void
 178 intelCopyTexImage1D(GLcontext * ctx, GLenum target, GLint level,
 179                     GLenum internalFormat,
 180                     GLint x, GLint y, GLsizei width, GLint border)
 181 {
 182    struct gl_texture_unit *texUnit =
 183       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 184    struct gl_texture_object *texObj =
 185       _mesa_select_tex_object(ctx, texUnit, target);
 186    struct gl_texture_image *texImage =
 187       _mesa_select_tex_image(ctx, texObj, target, level);
 188
 189    if (border)
 190       goto fail;
 191
 192    /* Setup or redefine the texture object, mipmap tree and texture
 193     * image.  Don't populate yet.
 194     */
 195    ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
 196                           width, border,
 197                           GL_RGBA, CHAN_TYPE, NULL,
 198                           &ctx->DefaultPacking, texObj, texImage);
 199
 200    if (!do_copy_texsubimage(intel_context(ctx),
 201                             intel_texture_image(texImage),
 202                             internalFormat, 0, 0, x, y, width, 1))
 203       goto fail;
 204
 205    return;
 206
 207  fail:
 208    _swrast_copy_teximage1d(ctx, target, level, internalFormat, x, y,
 209                            width, border);
 210 }
 211
 212 void
 213 intelCopyTexImage2D(GLcontext * ctx, GLenum target, GLint level,
 214                     GLenum internalFormat,
 215                     GLint x, GLint y, GLsizei width, GLsizei height,
 216                     GLint border)
 217 {
 218    struct gl_texture_unit *texUnit =
 219       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 220    struct gl_texture_object *texObj =
 221       _mesa_select_tex_object(ctx, texUnit, target);
 222    struct gl_texture_image *texImage =
 223       _mesa_select_tex_image(ctx, texObj, target, level);
 224
 225    if (border)
 226       goto fail;
 227
 228    /* Setup or redefine the texture object, mipmap tree and texture
 229     * image.  Don't populate yet.
 230     */
 231    ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
 232                           width, height, border,
 233                           GL_RGBA, CHAN_TYPE, NULL,
 234                           &ctx->DefaultPacking, texObj, texImage);
 235
 236
 237    if (!do_copy_texsubimage(intel_context(ctx),
 238                             intel_texture_image(texImage),
 239                             internalFormat, 0, 0, x, y, width, height))
 240       goto fail;
 241
 242    return;
 243
 244  fail:
 245    _swrast_copy_teximage2d(ctx, target, level, internalFormat, x, y,
 246                            width, height, border);
 247 }
 248
 249
 250 void
 251 intelCopyTexSubImage1D(GLcontext * ctx, GLenum target, GLint level,
 252                        GLint xoffset, GLint x, GLint y, GLsizei width)
 253 {
 254    struct gl_texture_unit *texUnit =
 255       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 256    struct gl_texture_object *texObj =
 257       _mesa_select_tex_object(ctx, texUnit, target);
 258    struct gl_texture_image *texImage =
 259       _mesa_select_tex_image(ctx, texObj, target, level);
 260    GLenum internalFormat = texImage->InternalFormat;
 261
 262    /* XXX need to check <border> as in above function? */
 263
 264    /* Need to check texture is compatible with source format.
 265     */
 266
 267    if (!do_copy_texsubimage(intel_context(ctx),
 268                             intel_texture_image(texImage),
 269                             internalFormat, xoffset, 0, x, y, width, 1)) {
 270       _swrast_copy_texsubimage1d(ctx, target, level, xoffset, x, y, width);
 271    }
 272 }
 273
 274
 275
 276 void
 277 intelCopyTexSubImage2D(GLcontext * ctx, GLenum target, GLint level,
 278                        GLint xoffset, GLint yoffset,
 279                        GLint x, GLint y, GLsizei width, GLsizei height)
 280 {
 281    struct gl_texture_unit *texUnit =
 282       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 283    struct gl_texture_object *texObj =
 284       _mesa_select_tex_object(ctx, texUnit, target);
 285    struct gl_texture_image *texImage =
 286       _mesa_select_tex_image(ctx, texObj, target, level);
 287    GLenum internalFormat = texImage->InternalFormat;
 288
 289
 290    /* Need to check texture is compatible with source format.
 291     */
 292
 293    if (!do_copy_texsubimage(intel_context(ctx),
 294                             intel_texture_image(texImage),
 295                             internalFormat,
 296                             xoffset, yoffset, x, y, width, height)) {
 297
 298       DBG("%s - fallback to swrast\n", __FUNCTION__);
 299
 300       _swrast_copy_texsubimage2d(ctx, target, level,
 301                                  xoffset, yoffset, x, y, width, height);
 302    }
 303 }