src/mesa/state_tracker/st_cb_blit.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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  /*
  29   * Authors:
  30   *   Brian Paul
  31   */
  32
  33 #include "main/imports.h"
  34 #include "main/image.h"
  35 #include "main/macros.h"
  36 #include "main/texformat.h"
  37 #include "shader/program.h"
  38 #include "shader/prog_parameter.h"
  39 #include "shader/prog_print.h"
  40
  41 #include "st_context.h"
  42 #include "st_program.h"
  43 #include "st_cb_blit.h"
  44 #include "st_cb_fbo.h"
  45
  46 #include "util/u_blit.h"
  47
  48 #include "cso_cache/cso_context.h"
  49
  50
  51 void
  52 st_init_blit(struct st_context *st)
  53 {
  54    st->blit = util_create_blit(st->pipe, st->cso_context);
  55 }
  56
  57
  58 void
  59 st_destroy_blit(struct st_context *st)
  60 {
  61    util_destroy_blit(st->blit);
  62    st->blit = NULL;
  63 }
  64
  65
  66 static void
  67 st_BlitFramebuffer(GLcontext *ctx,
  68                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  69                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  70                    GLbitfield mask, GLenum filter)
  71 {
  72    struct st_context *st = ctx->st;
  73
  74    const uint pFilter = ((filter == GL_NEAREST)
  75                          ? PIPE_TEX_MIPFILTER_NEAREST
  76                          : PIPE_TEX_MIPFILTER_LINEAR);
  77
  78    if (mask & GL_COLOR_BUFFER_BIT) {
  79       struct st_renderbuffer *srcRb =
  80          st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
  81       struct st_renderbuffer *dstRb =
  82          st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
  83       struct pipe_surface *srcSurf = srcRb->surface;
  84       struct pipe_surface *dstSurf = dstRb->surface;
  85
  86       if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
  87          /* invert Y */
  88          srcY0 = srcRb->Base.Height - srcY0;
  89          srcY1 = srcRb->Base.Height - srcY1;
  90
  91          dstY0 = dstRb->Base.Height - dstY0;
  92          dstY1 = dstRb->Base.Height - dstY1;
  93       }
  94
  95       util_blit_pixels(st->blit,
  96                        srcSurf, srcX0, srcY0, srcX1, srcY1,
  97                        dstSurf, dstX0, dstY0, dstX1, dstY1,
  98                        0.0, pFilter);
  99
 100    }
 101 }
 102
 103
 104
 105 void
 106 st_init_blit_functions(struct dd_function_table *functions)
 107 {
 108 #if FEATURE_EXT_framebuffer_blit
 109    functions->BlitFramebuffer = st_BlitFramebuffer;
 110 #endif
 111 }