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/texstate.h"
  33
  34 #include "drivers/common/meta.h"
  35
  36 #include "intel_screen.h"
  37 #include "intel_context.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 struct intel_renderbuffer *
  53 get_teximage_readbuffer(struct intel_context *intel, GLenum internalFormat)
  54 {
  55    DBG("%s %s\n", __FUNCTION__,
  56        _mesa_lookup_enum_by_nr(internalFormat));
  57
  58    if (_mesa_is_depth_format(internalFormat) ||
  59        _mesa_is_depthstencil_format(internalFormat))
  60       return intel_get_renderbuffer(intel->ctx.ReadBuffer, BUFFER_DEPTH);
  61
  62    return intel_renderbuffer(intel->ctx.ReadBuffer->_ColorReadBuffer);
  63 }
  64
  65
  66 GLboolean
  67 intel_copy_texsubimage(struct intel_context *intel,
  68                        struct intel_texture_image *intelImage,
  69                        GLint dstx, GLint dsty,
  70                        GLint x, GLint y, GLsizei width, GLsizei height)
  71 {
  72    struct gl_context *ctx = &intel->ctx;
  73    struct intel_renderbuffer *irb;
  74    const GLenum internalFormat = intelImage->base.InternalFormat;
  75    bool copy_supported = false;
  76    bool copy_supported_with_alpha_override = false;
  77
  78    intel_prepare_render(intel);
  79
  80    irb = get_teximage_readbuffer(intel, internalFormat);
  81    if (!intelImage->mt || !irb || !irb->region) {
  82       if (unlikely(INTEL_DEBUG & DEBUG_FALLBACKS))
  83          fprintf(stderr, "%s fail %p %p (0x%08x)\n",
  84                  __FUNCTION__, intelImage->mt, irb, internalFormat);
  85       return GL_FALSE;
  86    }
  87
  88    copy_supported = intelImage->base.TexFormat == irb->Base.Format;
  89
  90    /* Converting ARGB8888 to XRGB8888 is trivial: ignore the alpha bits */
  91    if (irb->Base.Format == MESA_FORMAT_ARGB8888 &&
  92        intelImage->base.TexFormat == MESA_FORMAT_XRGB8888) {
  93       copy_supported = true;
  94    }
  95
  96    /* Converting XRGB8888 to ARGB8888 requires setting the alpha bits to 1.0 */
  97    if (irb->Base.Format == MESA_FORMAT_XRGB8888 &&
  98        intelImage->base.TexFormat == MESA_FORMAT_ARGB8888) {
  99       copy_supported_with_alpha_override = true;
 100    }
 101
 102    if (!copy_supported && !copy_supported_with_alpha_override) {
 103       if (unlikely(INTEL_DEBUG & DEBUG_FALLBACKS))
 104          fprintf(stderr, "%s mismatched formats %s, %s\n",
 105                  __FUNCTION__,
 106                  _mesa_get_format_name(intelImage->base.TexFormat),
 107                  _mesa_get_format_name(irb->Base.Format));
 108       return GL_FALSE;
 109    }
 110
 111    {
 112       drm_intel_bo *dst_bo = intel_region_buffer(intel,
 113                                                  intelImage->mt->region,
 114                                                  INTEL_WRITE_PART);
 115       GLuint image_x, image_y;
 116       GLshort src_pitch;
 117
 118       /* get dest x/y in destination texture */
 119       intel_miptree_get_image_offset(intelImage->mt,
 120                                      intelImage->base.Level,
 121                                      intelImage->base.Face,
 122                                      0,
 123                                      &image_x, &image_y);
 124
 125       /* The blitter can't handle Y-tiled buffers. */
 126       if (intelImage->mt->region->tiling == I915_TILING_Y) {
 127          return GL_FALSE;
 128       }
 129
 130       if (ctx->ReadBuffer->Name == 0) {
 131          /* Flip vertical orientation for system framebuffers */
 132          y = ctx->ReadBuffer->Height - (y + height);
 133          src_pitch = -irb->region->pitch;
 134       } else {
 135          /* reading from a FBO, y is already oriented the way we like */
 136          src_pitch = irb->region->pitch;
 137       }
 138
 139       /* blit from src buffer to texture */
 140       if (!intelEmitCopyBlit(intel,
 141                              intelImage->mt->cpp,
 142                              src_pitch,
 143                              irb->region->buffer,
 144                              0,
 145                              irb->region->tiling,
 146                              intelImage->mt->region->pitch,
 147                              dst_bo,
 148                              0,
 149                              intelImage->mt->region->tiling,
 150                              irb->draw_x + x, irb->draw_y + y,
 151                              image_x + dstx, image_y + dsty,
 152                              width, height,
 153                              GL_COPY)) {
 154          return GL_FALSE;
 155       }
 156    }
 157
 158    if (copy_supported_with_alpha_override)
 159       intel_set_teximage_alpha_to_one(ctx, intelImage);
 160
 161    return GL_TRUE;
 162 }
 163
 164
 165 static void
 166 intelCopyTexSubImage1D(struct gl_context * ctx, GLenum target, GLint level,
 167                        GLint xoffset, GLint x, GLint y, GLsizei width)
 168 {
 169    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 170    struct gl_texture_object *texObj =
 171       _mesa_select_tex_object(ctx, texUnit, target);
 172    struct gl_texture_image *texImage =
 173       _mesa_select_tex_image(ctx, texObj, target, level);
 174
 175    /* XXX need to check <border> as in above function? */
 176
 177    /* Need to check texture is compatible with source format.
 178     */
 179
 180    if (!intel_copy_texsubimage(intel_context(ctx),
 181                                intel_texture_image(texImage),
 182                                xoffset, 0, x, y, width, 1)) {
 183       fallback_debug("%s - fallback to swrast\n", __FUNCTION__);
 184       _mesa_meta_CopyTexSubImage1D(ctx, target, level, xoffset, x, y, width);
 185    }
 186 }
 187
 188
 189 static void
 190 intelCopyTexSubImage2D(struct gl_context * ctx, GLenum target, GLint level,
 191                        GLint xoffset, GLint yoffset,
 192                        GLint x, GLint y, GLsizei width, GLsizei height)
 193 {
 194    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 195    struct gl_texture_object *texObj =
 196       _mesa_select_tex_object(ctx, texUnit, target);
 197    struct gl_texture_image *texImage =
 198       _mesa_select_tex_image(ctx, texObj, target, level);
 199
 200    /* Need to check texture is compatible with source format.
 201     */
 202
 203    if (!intel_copy_texsubimage(intel_context(ctx),
 204                                intel_texture_image(texImage),
 205                                xoffset, yoffset, x, y, width, height)) {
 206       fallback_debug("%s - fallback to swrast\n", __FUNCTION__);
 207       _mesa_meta_CopyTexSubImage2D(ctx, target, level,
 208                                    xoffset, yoffset, x, y, width, height);
 209    }
 210 }
 211
 212
 213 void
 214 intelInitTextureCopyImageFuncs(struct dd_function_table *functions)
 215 {
 216    functions->CopyTexSubImage1D = intelCopyTexSubImage1D;
 217    functions->CopyTexSubImage2D = intelCopyTexSubImage2D;
 218 }