src/mesa/drivers/dri/radeon/radeon_pixel_read.c

   1 /*
   2  * Copyright (C) 2010 Maciej Cencora <m.cencora@gmail.com>
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a 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, sublicense, 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
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 #include "stdint.h"
  29 #include "main/bufferobj.h"
  30 #include "main/enums.h"
  31 #include "main/image.h"
  32 #include "main/readpix.h"
  33 #include "main/state.h"
  34
  35 #include "radeon_buffer_objects.h"
  36 #include "radeon_common_context.h"
  37 #include "radeon_debug.h"
  38 #include "radeon_mipmap_tree.h"
  39
  40 static gl_format gl_format_and_type_to_mesa_format(GLenum format, GLenum type)
  41 {
  42     switch (format)
  43     {
  44         case GL_RGB:
  45             switch (type) {
  46                 case GL_UNSIGNED_SHORT_5_6_5:
  47                     return MESA_FORMAT_RGB565;
  48                 case GL_UNSIGNED_SHORT_5_6_5_REV:
  49                     return MESA_FORMAT_RGB565_REV;
  50             }
  51             break;
  52         case GL_RGBA:
  53             switch (type) {
  54                 case GL_FLOAT:
  55                     return MESA_FORMAT_RGBA_FLOAT32;
  56                 case GL_UNSIGNED_SHORT_5_5_5_1:
  57                     return MESA_FORMAT_RGBA5551;
  58                 case GL_UNSIGNED_INT_8_8_8_8:
  59                     return MESA_FORMAT_RGBA8888;
  60                 case GL_UNSIGNED_BYTE:
  61                 case GL_UNSIGNED_INT_8_8_8_8_REV:
  62                     return MESA_FORMAT_RGBA8888_REV;
  63             }
  64             break;
  65         case GL_BGRA:
  66             switch (type) {
  67                 case GL_UNSIGNED_SHORT_4_4_4_4:
  68                     return MESA_FORMAT_ARGB4444_REV;
  69                 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
  70                     return MESA_FORMAT_ARGB4444;
  71                 case GL_UNSIGNED_SHORT_5_5_5_1:
  72                     return MESA_FORMAT_ARGB1555_REV;
  73                 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
  74                     return MESA_FORMAT_ARGB1555;
  75                 case GL_UNSIGNED_INT_8_8_8_8:
  76                     return MESA_FORMAT_ARGB8888_REV;
  77                 case GL_UNSIGNED_BYTE:
  78                 case GL_UNSIGNED_INT_8_8_8_8_REV:
  79                     return MESA_FORMAT_ARGB8888;
  80
  81             }
  82             break;
  83     }
  84
  85     return MESA_FORMAT_NONE;
  86 }
  87
  88 static GLboolean
  89 do_blit_readpixels(struct gl_context * ctx,
  90                    GLint x, GLint y, GLsizei width, GLsizei height,
  91                    GLenum format, GLenum type,
  92                    const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
  93 {
  94     radeonContextPtr radeon = RADEON_CONTEXT(ctx);
  95     const struct radeon_renderbuffer *rrb = radeon_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
  96     const gl_format dst_format = gl_format_and_type_to_mesa_format(format, type);
  97     unsigned dst_rowstride, dst_imagesize, aligned_rowstride, flip_y;
  98     struct radeon_bo *dst_buffer;
  99     GLint dst_x = 0, dst_y = 0;
 100     intptr_t dst_offset;
 101
 102     /* It's not worth if number of pixels to copy is really small */
 103     if (width * height < 100) {
 104         return GL_FALSE;
 105     }
 106
 107     if (dst_format == MESA_FORMAT_NONE ||
 108         !radeon->vtbl.check_blit(dst_format, rrb->pitch / rrb->cpp) || !radeon->vtbl.blit) {
 109         return GL_FALSE;
 110     }
 111
 112     if (ctx->_ImageTransferState || ctx->Color.ColorLogicOpEnabled) {
 113         return GL_FALSE;
 114     }
 115
 116     if (pack->SwapBytes || pack->LsbFirst) {
 117         return GL_FALSE;
 118     }
 119
 120     if (pack->RowLength > 0) {
 121         dst_rowstride = pack->RowLength;
 122     } else {
 123         dst_rowstride = width;
 124     }
 125
 126     if (!_mesa_clip_copytexsubimage(ctx, &dst_x, &dst_y, &x, &y, &width, &height)) {
 127         return GL_TRUE;
 128     }
 129     assert(x >= 0 && y >= 0);
 130
 131     aligned_rowstride = get_texture_image_row_stride(radeon, dst_format, dst_rowstride, 0, GL_TEXTURE_2D);
 132     dst_rowstride *= _mesa_get_format_bytes(dst_format);
 133     if (_mesa_is_bufferobj(pack->BufferObj) && aligned_rowstride != dst_rowstride)
 134         return GL_FALSE;
 135     dst_imagesize = get_texture_image_size(dst_format,
 136                                            aligned_rowstride,
 137                                            height, 1, 0);
 138
 139     if (!_mesa_is_bufferobj(pack->BufferObj))
 140     {
 141         dst_buffer = radeon_bo_open(radeon->radeonScreen->bom, 0, dst_imagesize, 1024, RADEON_GEM_DOMAIN_GTT, 0);
 142         dst_offset = 0;
 143     }
 144     else
 145     {
 146         dst_buffer = get_radeon_buffer_object(pack->BufferObj)->bo;
 147         dst_offset = (intptr_t)pixels;
 148     }
 149
 150     /* Disable source Y flipping for FBOs */
 151     flip_y = (ctx->ReadBuffer->Name == 0);
 152     if (pack->Invert) {
 153         y = rrb->base.Height - height - y;
 154         flip_y = !flip_y;
 155     }
 156
 157     if (radeon->vtbl.blit(ctx,
 158                           rrb->bo,
 159                           rrb->draw_offset,
 160                           rrb->base.Format,
 161                           rrb->pitch / rrb->cpp,
 162                           rrb->base.Width,
 163                           rrb->base.Height,
 164                           x,
 165                           y,
 166                           dst_buffer,
 167                           dst_offset,
 168                           dst_format,
 169                           aligned_rowstride / _mesa_get_format_bytes(dst_format),
 170                           width,
 171                           height,
 172                           0, /* dst_x */
 173                           0, /* dst_y */
 174                           width,
 175                           height,
 176                           flip_y))
 177     {
 178         if (!_mesa_is_bufferobj(pack->BufferObj))
 179         {
 180             radeon_bo_map(dst_buffer, 0);
 181             copy_rows(pixels, dst_rowstride, dst_buffer->ptr,
 182                       aligned_rowstride, height, dst_rowstride);
 183             radeon_bo_unmap(dst_buffer);
 184             radeon_bo_unref(dst_buffer);
 185         }
 186
 187         return GL_TRUE;
 188     }
 189
 190     if (!_mesa_is_bufferobj(pack->BufferObj))
 191         radeon_bo_unref(dst_buffer);
 192
 193     return GL_FALSE;
 194 }
 195
 196 void
 197 radeonReadPixels(struct gl_context * ctx,
 198                  GLint x, GLint y, GLsizei width, GLsizei height,
 199                  GLenum format, GLenum type,
 200                  const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
 201 {
 202     radeonContextPtr radeon = RADEON_CONTEXT(ctx);
 203     radeon_prepare_render(radeon);
 204
 205     if (do_blit_readpixels(ctx, x, y, width, height, format, type, pack, pixels))
 206         return;
 207
 208     /* Update Mesa state before calling _mesa_readpixels().
 209      * XXX this may not be needed since ReadPixels no longer uses the
 210      * span code.
 211      */
 212     radeon_print(RADEON_FALLBACKS, RADEON_NORMAL,
 213                  "Falling back to sw for ReadPixels (format %s, type %s)\n",
 214                  _mesa_lookup_enum_by_nr(format), _mesa_lookup_enum_by_nr(type));
 215
 216     if (ctx->NewState)
 217         _mesa_update_state(ctx);
 218
 219     _mesa_readpixels(ctx, x, y, width, height, format, type, pack, pixels);
 220 }