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

   1 /**************************************************************************
   2
   3 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   4 Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
   5                      VA Linux Systems Inc., Fremont, California.
   6
   7 The Weather Channel (TM) funded Tungsten Graphics to develop the
   8 initial release of the Radeon 8500 driver under the XFree86 license.
   9 This notice must be preserved.
  10
  11 All Rights Reserved.
  12
  13 Permission is hereby granted, free of charge, to any person obtaining
  14 a copy of this software and associated documentation files (the
  15 "Software"), to deal in the Software without restriction, including
  16 without limitation the rights to use, copy, modify, merge, publish,
  17 distribute, sublicense, and/or sell copies of the Software, and to
  18 permit persons to whom the Software is furnished to do so, subject to
  19 the following conditions:
  20
  21 The above copyright notice and this permission notice (including the
  22 next paragraph) shall be included in all copies or substantial
  23 portions of the Software.
  24
  25 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  28 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  29 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32
  33 **************************************************************************/
  34
  35 /*
  36  * Authors:
  37  *   Kevin E. Martin <martin@valinux.com>
  38  *   Gareth Hughes <gareth@valinux.com>
  39  *   Keith Whitwell <keithw@vmware.com>
  40  *
  41  */
  42
  43 #include "main/glheader.h"
  44 #include "main/texformat.h"
  45 #include "main/renderbuffer.h"
  46 #include "main/samplerobj.h"
  47 #include "main/framebuffer.h"
  48 #include "swrast/swrast.h"
  49 #include "swrast/s_renderbuffer.h"
  50
  51 #include "radeon_common.h"
  52 #include "radeon_span.h"
  53
  54
  55 static void
  56 radeon_renderbuffer_map(struct gl_context *ctx,
  57                         struct gl_renderbuffer *rb,
  58                         bool flip_y)
  59 {
  60         struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
  61         GLubyte *map;
  62         int stride;
  63
  64         if (!rb || !rrb)
  65                 return;
  66
  67         ctx->Driver.MapRenderbuffer(ctx, rb, 0, 0, rb->Width, rb->Height,
  68                                     GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
  69                                     &map, &stride, flip_y);
  70
  71         rrb->base.Map = map;
  72         rrb->base.RowStride = stride;
  73         /* No floating point color buffers, use GLubytes */
  74         rrb->base.ColorType = GL_UNSIGNED_BYTE;
  75 }
  76
  77 static void
  78 radeon_renderbuffer_unmap(struct gl_context *ctx, struct gl_renderbuffer *rb)
  79 {
  80         struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
  81         if (!rb || !rrb)
  82                 return;
  83
  84         ctx->Driver.UnmapRenderbuffer(ctx, rb);
  85
  86         rrb->base.Map = NULL;
  87         rrb->base.RowStride = 0;
  88 }
  89
  90 static void
  91 radeon_map_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
  92 {
  93         GLuint i;
  94
  95         radeon_print(RADEON_MEMORY, RADEON_TRACE,
  96                 "%s( %p , fb %p )\n",
  97                      __func__, ctx, fb);
  98
  99         /* check for render to textures */
 100         for (i = 0; i < BUFFER_COUNT; i++)
 101                 radeon_renderbuffer_map(ctx, fb->Attachment[i].Renderbuffer,
 102                         fb->FlipY);
 103
 104         if (_mesa_is_front_buffer_drawing(fb))
 105                 RADEON_CONTEXT(ctx)->front_buffer_dirty = true;
 106 }
 107
 108 static void
 109 radeon_unmap_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
 110 {
 111         GLuint i;
 112
 113         radeon_print(RADEON_MEMORY, RADEON_TRACE,
 114                 "%s( %p , fb %p)\n",
 115                      __func__, ctx, fb);
 116
 117         /* check for render to textures */
 118         for (i = 0; i < BUFFER_COUNT; i++)
 119                 radeon_renderbuffer_unmap(ctx, fb->Attachment[i].Renderbuffer);
 120
 121         if (_mesa_is_front_buffer_drawing(fb))
 122                 RADEON_CONTEXT(ctx)->front_buffer_dirty = true;
 123 }
 124
 125 static void radeonSpanRenderStart(struct gl_context * ctx)
 126 {
 127         radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
 128
 129         radeon_firevertices(rmesa);
 130
 131         _swrast_map_textures(ctx);
 132
 133         radeon_map_framebuffer(ctx, ctx->DrawBuffer);
 134         if (ctx->ReadBuffer != ctx->DrawBuffer)
 135                 radeon_map_framebuffer(ctx, ctx->ReadBuffer);
 136 }
 137
 138 static void radeonSpanRenderFinish(struct gl_context * ctx)
 139 {
 140         _swrast_flush(ctx);
 141         _swrast_unmap_textures(ctx);
 142
 143         radeon_unmap_framebuffer(ctx, ctx->DrawBuffer);
 144         if (ctx->ReadBuffer != ctx->DrawBuffer)
 145                 radeon_unmap_framebuffer(ctx, ctx->ReadBuffer);
 146 }
 147
 148 void radeonInitSpanFuncs(struct gl_context * ctx)
 149 {
 150         struct swrast_device_driver *swdd =
 151             _swrast_GetDeviceDriverReference(ctx);
 152         swdd->SpanRenderStart = radeonSpanRenderStart;
 153         swdd->SpanRenderFinish = radeonSpanRenderFinish;
 154 }
 155