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_drawpixels.h"
  44 #include "st_cb_blit.h"
  45 #include "st_cb_fbo.h"
  46
  47 #include "util/u_blit.h"
  48
  49 #include "cso_cache/cso_context.h"
  50
  51
  52 void
  53 st_init_blit(struct st_context *st)
  54 {
  55    st->blit = util_create_blit(st->pipe, st->cso_context);
  56 }
  57
  58
  59 void
  60 st_destroy_blit(struct st_context *st)
  61 {
  62    util_destroy_blit(st->blit);
  63    st->blit = NULL;
  64 }
  65
  66
  67 static void
  68 st_BlitFramebuffer(GLcontext *ctx,
  69                    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  70                    GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  71                    GLbitfield mask, GLenum filter)
  72 {
  73    struct st_context *st = ctx->st;
  74
  75    const uint pFilter = ((filter == GL_NEAREST)
  76                          ? PIPE_TEX_MIPFILTER_NEAREST
  77                          : PIPE_TEX_MIPFILTER_LINEAR);
  78
  79    if (mask & GL_COLOR_BUFFER_BIT) {
  80       struct st_renderbuffer *srcRb =
  81          st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
  82       struct st_renderbuffer *dstRb =
  83          st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0][0]);
  84       struct pipe_surface *srcSurf = srcRb->surface;
  85       struct pipe_surface *dstSurf = dstRb->surface;
  86
  87       if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
  88          /* invert Y */
  89          srcY0 = srcRb->Base.Height - srcY0;
  90          srcY1 = srcRb->Base.Height - srcY1;
  91
  92          dstY0 = dstRb->Base.Height - dstY0;
  93          dstY1 = dstRb->Base.Height - dstY1;
  94       }
  95
  96       util_blit_pixels(st->blit,
  97                        srcSurf, srcX0, srcY0, srcX1, srcY1,
  98                        dstSurf, dstX0, dstY0, dstX1, dstY1,
  99                        0.0, pFilter);
 100
 101    }
 102 }
 103
 104
 105
 106 void
 107 st_init_blit_functions(struct dd_function_table *functions)
 108 {
 109 #if FEATURE_EXT_framebuffer_blit
 110    functions->BlitFramebuffer = st_BlitFramebuffer;
 111 #endif
 112 }