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/fbobject.h"
  32 #include "main/image.h"
  33 #include "main/readpix.h"
  34 #include "main/state.h"
  35
  36 #include "radeon_common_context.h"
  37 #include "radeon_buffer_objects.h"
  38 #include "radeon_debug.h"
  39 #include "radeon_mipmap_tree.h"
  40
  41 static mesa_format gl_format_and_type_to_mesa_format(GLenum format, GLenum type)
  42 {
  43     switch (format)
  44     {
  45         case GL_RGB:
  46             switch (type) {
  47                 case GL_UNSIGNED_SHORT_5_6_5:
  48                     return MESA_FORMAT_B5G6R5_UNORM;
  49                 case GL_UNSIGNED_SHORT_5_6_5_REV:
  50                     return MESA_FORMAT_R5G6B5_UNORM;
  51             }
  52             break;
  53         case GL_RGBA:
  54             switch (type) {
  55                 case GL_FLOAT:
  56                     return MESA_FORMAT_RGBA_FLOAT32;
  57                 case GL_UNSIGNED_SHORT_5_5_5_1:
  58                     return MESA_FORMAT_A1B5G5R5_UNORM;
  59                 case GL_UNSIGNED_INT_8_8_8_8:
  60                     return MESA_FORMAT_A8B8G8R8_UNORM;
  61                 case GL_UNSIGNED_BYTE:
  62                 case GL_UNSIGNED_INT_8_8_8_8_REV:
  63                     return MESA_FORMAT_R8G8B8A8_UNORM;
  64             }
  65             break;
  66         case GL_BGRA:
  67             switch (type) {
  68                 case GL_UNSIGNED_SHORT_4_4_4_4:
  69                     return MESA_FORMAT_A4R4G4B4_UNORM;
  70                 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
  71                     return MESA_FORMAT_B4G4R4A4_UNORM;
  72                 case GL_UNSIGNED_SHORT_5_5_5_1:
  73                     return MESA_FORMAT_A1R5G5B5_UNORM;
  74                 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
  75                     return MESA_FORMAT_B5G5R5A1_UNORM;
  76                 case GL_UNSIGNED_INT_8_8_8_8:
  77                     return MESA_FORMAT_A8R8G8B8_UNORM;
  78                 case GL_UNSIGNED_BYTE:
  79                 case GL_UNSIGNED_INT_8_8_8_8_REV:
  80                     return MESA_FORMAT_B8G8R8A8_UNORM;
  81
  82             }
  83             break;
  84     }
  85
  86     return MESA_FORMAT_NONE;
  87 }
  88
  89 static GLboolean
  90 do_blit_readpixels(struct gl_context * ctx,
  91                    GLint x, GLint y, GLsizei width, GLsizei height,
  92                    GLenum format, GLenum type,
  93                    const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
  94 {
  95     radeonContextPtr radeon = RADEON_CONTEXT(ctx);
  96     const struct radeon_renderbuffer *rrb = radeon_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
  97     const mesa_format dst_format = gl_format_and_type_to_mesa_format(format, type);
  98     unsigned dst_rowstride, dst_imagesize, aligned_rowstride, flip_y;
  99     struct radeon_bo *dst_buffer;
 100     GLint dst_x = 0, dst_y = 0;
 101     intptr_t dst_offset;
 102
 103     /* It's not worth if number of pixels to copy is really small */
 104     if (width * height < 100) {
 105         return GL_FALSE;
 106     }
 107
 108     if (dst_format == MESA_FORMAT_NONE ||
 109         !radeon->vtbl.check_blit(dst_format, rrb->pitch / rrb->cpp) || !radeon->vtbl.blit) {
 110         return GL_FALSE;
 111     }
 112
 113     if (ctx->_ImageTransferState || ctx->Color.ColorLogicOpEnabled) {
 114         return GL_FALSE;
 115     }
 116
 117     if (pack->SwapBytes || pack->LsbFirst) {
 118         return GL_FALSE;
 119     }
 120
 121     if (pack->RowLength > 0) {
 122         dst_rowstride = pack->RowLength;
 123     } else {
 124         dst_rowstride = width;
 125     }
 126
 127     if (!_mesa_clip_copytexsubimage(ctx, &dst_x, &dst_y, &x, &y, &width, &height)) {
 128         return GL_TRUE;
 129     }
 130     assert(x >= 0 && y >= 0);
 131
 132     aligned_rowstride = get_texture_image_row_stride(radeon, dst_format, dst_rowstride, 0, GL_TEXTURE_2D);
 133     dst_rowstride *= _mesa_get_format_bytes(dst_format);
 134     if (pack->BufferObj && aligned_rowstride != dst_rowstride)
 135         return GL_FALSE;
 136     dst_imagesize = get_texture_image_size(dst_format,
 137                                            aligned_rowstride,
 138                                            height, 1, 0);
 139
 140     if (!pack->BufferObj)
 141     {
 142         dst_buffer = radeon_bo_open(radeon->radeonScreen->bom, 0, dst_imagesize, 1024, RADEON_GEM_DOMAIN_GTT, 0);
 143         dst_offset = 0;
 144     }
 145     else
 146     {
 147         dst_buffer = get_radeon_buffer_object(pack->BufferObj)->bo;
 148         dst_offset = (intptr_t)pixels;
 149     }
 150
 151     /* Disable source Y flipping for FBOs */
 152     flip_y = _mesa_is_winsys_fbo(ctx->ReadBuffer);
 153     if (pack->Invert) {
 154         y = rrb->base.Base.Height - height - y;
 155         flip_y = !flip_y;
 156     }
 157
 158     if (radeon->vtbl.blit(ctx,
 159                           rrb->bo,
 160                           rrb->draw_offset,
 161                           rrb->base.Base.Format,
 162                           rrb->pitch / rrb->cpp,
 163                           rrb->base.Base.Width,
 164                           rrb->base.Base.Height,
 165                           x,
 166                           y,
 167                           dst_buffer,
 168                           dst_offset,
 169                           dst_format,
 170                           aligned_rowstride / _mesa_get_format_bytes(dst_format),
 171                           width,
 172                           height,
 173                           0, /* dst_x */
 174                           0, /* dst_y */
 175                           width,
 176                           height,
 177                           flip_y))
 178     {
 179        if (!pack->BufferObj)
 180        {
 181             radeon_bo_map(dst_buffer, 0);
 182             copy_rows(pixels, dst_rowstride, dst_buffer->ptr,
 183                       aligned_rowstride, height, dst_rowstride);
 184             radeon_bo_unmap(dst_buffer);
 185             radeon_bo_unref(dst_buffer);
 186         }
 187
 188         return GL_TRUE;
 189     }
 190
 191     if (!pack->BufferObj)
 192         radeon_bo_unref(dst_buffer);
 193
 194     return GL_FALSE;
 195 }
 196
 197 void
 198 radeonReadPixels(struct gl_context * ctx,
 199                  GLint x, GLint y, GLsizei width, GLsizei height,
 200                  GLenum format, GLenum type,
 201                  const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
 202 {
 203     radeonContextPtr radeon = RADEON_CONTEXT(ctx);
 204     radeon_prepare_render(radeon);
 205
 206     if (do_blit_readpixels(ctx, x, y, width, height, format, type, pack, pixels))
 207         return;
 208
 209     /* Update Mesa state before calling _mesa_readpixels().
 210      * XXX this may not be needed since ReadPixels no longer uses the
 211      * span code.
 212      */
 213     radeon_print(RADEON_FALLBACKS, RADEON_NORMAL,
 214                  "Falling back to sw for ReadPixels (format %s, type %s)\n",
 215                  _mesa_enum_to_string(format), _mesa_enum_to_string(type));
 216
 217     if (ctx->NewState)
 218         _mesa_update_state(ctx);
 219
 220     _mesa_readpixels(ctx, x, y, width, height, format, type, pack, pixels);
 221 }