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