src/mesa/drivers/dri/i915tex/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 #include "intel_pixel.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_ARB:
  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->intelScreen->cpp == 2)
  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                     struct intel_texture_image *intelImage,
  90                     GLenum internalFormat,
  91                     GLint dstx, GLint dsty,
  92                     GLint x, GLint y, GLsizei width, GLsizei height)
  93 {
  94    GLcontext *ctx = &intel->ctx;
  95    const struct intel_region *src =
  96       get_teximage_source(intel, internalFormat);
  97
  98    if (!intelImage->mt || !src) {
  99       DBG("%s fail %p %p\n", __FUNCTION__, intelImage->mt, src);
 100       return GL_FALSE;
 101    }
 102
 103    intelFlush(ctx);
 104    LOCK_HARDWARE(intel);
 105    {
 106       GLuint image_offset = intel_miptree_image_offset(intelImage->mt,
 107                                                        intelImage->face,
 108                                                        intelImage->level);
 109       const GLint orig_x = x;
 110       const GLint orig_y = y;
 111       const struct gl_framebuffer *fb = ctx->DrawBuffer;
 112
 113       if (_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, fb->_Xmax, fb->_Ymax,
 114                                &x, &y, &width, &height)) {
 115          /* Update dst for clipped src.  Need to also clip the source rect.
 116           */
 117          dstx += x - orig_x;
 118          dsty += y - orig_y;
 119
 120          if (ctx->ReadBuffer->Name == 0) {
 121             /* reading from a window, adjust x, y */
 122             __DRIdrawablePrivate *dPriv = intel->driDrawable;
 123             GLuint window_y;
 124             /* window_y = position of window on screen if y=0=bottom */
 125             window_y = intel->intelScreen->height - (dPriv->y + dPriv->h);
 126             y = window_y + y;
 127             x += dPriv->x;
 128          }
 129          else {
 130             /* reading from a FBO */
 131             /* invert Y */
 132             y = ctx->ReadBuffer->Height - y - 1;
 133          }
 134
 135
 136          /* A bit of fiddling to get the blitter to work with -ve
 137           * pitches.  But we get a nice inverted blit this way, so it's
 138           * worth it:
 139           */
 140          intelEmitCopyBlit(intel,
 141                            intelImage->mt->cpp,
 142                            -src->pitch,
 143                            src->buffer,
 144                            src->height * src->pitch * src->cpp,
 145                            intelImage->mt->pitch,
 146                            intelImage->mt->region->buffer,
 147                            image_offset,
 148                            x, y + height, dstx, dsty, width, height);
 149
 150          intel_batchbuffer_flush(intel->batch);
 151       }
 152    }
 153
 154
 155    UNLOCK_HARDWARE(intel);
 156
 157 #if 0
 158    /* GL_SGIS_generate_mipmap -- this can be accelerated now.
 159     * XXX Add a ctx->Driver.GenerateMipmaps() function?
 160     */
 161    if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
 162       intel_generate_mipmap(ctx, target,
 163                             &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
 164                             texObj);
 165    }
 166 #endif
 167
 168    return GL_TRUE;
 169 }
 170
 171
 172
 173
 174
 175 void
 176 intelCopyTexImage1D(GLcontext * ctx, GLenum target, GLint level,
 177                     GLenum internalFormat,
 178                     GLint x, GLint y, GLsizei width, GLint border)
 179 {
 180    struct gl_texture_unit *texUnit =
 181       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 182    struct gl_texture_object *texObj =
 183       _mesa_select_tex_object(ctx, texUnit, target);
 184    struct gl_texture_image *texImage =
 185       _mesa_select_tex_image(ctx, texObj, target, level);
 186
 187    if (border)
 188       goto fail;
 189
 190    /* Setup or redefine the texture object, mipmap tree and texture
 191     * image.  Don't populate yet.
 192     */
 193    ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
 194                           width, border,
 195                           GL_RGBA, CHAN_TYPE, NULL,
 196                           &ctx->DefaultPacking, texObj, texImage);
 197
 198    if (!do_copy_texsubimage(intel_context(ctx),
 199                             intel_texture_image(texImage),
 200                             internalFormat, 0, 0, x, y, width, 1))
 201       goto fail;
 202
 203    return;
 204
 205  fail:
 206    _swrast_copy_teximage1d(ctx, target, level, internalFormat, x, y,
 207                            width, border);
 208 }
 209
 210 void
 211 intelCopyTexImage2D(GLcontext * ctx, GLenum target, GLint level,
 212                     GLenum internalFormat,
 213                     GLint x, GLint y, GLsizei width, GLsizei height,
 214                     GLint border)
 215 {
 216    struct gl_texture_unit *texUnit =
 217       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 218    struct gl_texture_object *texObj =
 219       _mesa_select_tex_object(ctx, texUnit, target);
 220    struct gl_texture_image *texImage =
 221       _mesa_select_tex_image(ctx, texObj, target, level);
 222
 223    if (border)
 224       goto fail;
 225
 226    /* Setup or redefine the texture object, mipmap tree and texture
 227     * image.  Don't populate yet.
 228     */
 229    ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
 230                           width, height, border,
 231                           GL_RGBA, CHAN_TYPE, NULL,
 232                           &ctx->DefaultPacking, texObj, texImage);
 233
 234
 235    if (!do_copy_texsubimage(intel_context(ctx),
 236                             intel_texture_image(texImage),
 237                             internalFormat, 0, 0, x, y, width, height))
 238       goto fail;
 239
 240    return;
 241
 242  fail:
 243    _swrast_copy_teximage2d(ctx, target, level, internalFormat, x, y,
 244                            width, height, border);
 245 }
 246
 247
 248 void
 249 intelCopyTexSubImage1D(GLcontext * ctx, GLenum target, GLint level,
 250                        GLint xoffset, GLint x, GLint y, GLsizei width)
 251 {
 252    struct gl_texture_unit *texUnit =
 253       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 254    struct gl_texture_object *texObj =
 255       _mesa_select_tex_object(ctx, texUnit, target);
 256    struct gl_texture_image *texImage =
 257       _mesa_select_tex_image(ctx, texObj, target, level);
 258    GLenum internalFormat = texImage->InternalFormat;
 259
 260    /* XXX need to check <border> as in above function? */
 261
 262    /* Need to check texture is compatible with source format.
 263     */
 264
 265    if (!do_copy_texsubimage(intel_context(ctx),
 266                             intel_texture_image(texImage),
 267                             internalFormat, xoffset, 0, x, y, width, 1)) {
 268       _swrast_copy_texsubimage1d(ctx, target, level, xoffset, x, y, width);
 269    }
 270 }
 271
 272
 273
 274 void
 275 intelCopyTexSubImage2D(GLcontext * ctx, GLenum target, GLint level,
 276                        GLint xoffset, GLint yoffset,
 277                        GLint x, GLint y, GLsizei width, GLsizei height)
 278 {
 279    struct gl_texture_unit *texUnit =
 280       &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 281    struct gl_texture_object *texObj =
 282       _mesa_select_tex_object(ctx, texUnit, target);
 283    struct gl_texture_image *texImage =
 284       _mesa_select_tex_image(ctx, texObj, target, level);
 285    GLenum internalFormat = texImage->InternalFormat;
 286
 287
 288    /* Need to check texture is compatible with source format.
 289     */
 290
 291    if (!do_copy_texsubimage(intel_context(ctx),
 292                             intel_texture_image(texImage),
 293                             internalFormat,
 294                             xoffset, yoffset, x, y, width, height)) {
 295
 296       DBG("%s - fallback to swrast\n", __FUNCTION__);
 297
 298       _swrast_copy_texsubimage2d(ctx, target, level,
 299                                  xoffset, yoffset, x, y, width, height);
 300    }
 301 }