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 <keith@tungstengraphics.com>
  40  *
  41  */
  42
  43 #include "main/glheader.h"
  44 #include "main/texformat.h"
  45 #include "main/renderbuffer.h"
  46 #include "swrast/swrast.h"
  47 #include "swrast/s_renderbuffer.h"
  48
  49 #include "radeon_common.h"
  50 #include "radeon_span.h"
  51
  52
  53 static void
  54 radeon_renderbuffer_map(struct gl_context *ctx, struct gl_renderbuffer *rb)
  55 {
  56         struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
  57         GLubyte *map;
  58         int stride;
  59
  60         if (!rb || !rrb)
  61                 return;
  62
  63         ctx->Driver.MapRenderbuffer(ctx, rb, 0, 0, rb->Width, rb->Height,
  64                                     GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
  65                                     &map, &stride);
  66
  67         rb->Map = map;
  68         rb->RowStrideBytes = stride;
  69 }
  70
  71 static void
  72 radeon_renderbuffer_unmap(struct gl_context *ctx, struct gl_renderbuffer *rb)
  73 {
  74         struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
  75         if (!rb || !rrb)
  76                 return;
  77
  78         ctx->Driver.UnmapRenderbuffer(ctx, rb);
  79
  80         rb->Map = NULL;
  81         rb->RowStrideBytes = 0;
  82 }
  83
  84 static void
  85 radeon_map_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
  86 {
  87         GLuint i;
  88
  89         radeon_print(RADEON_MEMORY, RADEON_TRACE,
  90                 "%s( %p , fb %p )\n",
  91                      __func__, ctx, fb);
  92
  93         /* check for render to textures */
  94         for (i = 0; i < BUFFER_COUNT; i++)
  95                 radeon_renderbuffer_map(ctx, fb->Attachment[i].Renderbuffer);
  96
  97         radeon_check_front_buffer_rendering(ctx);
  98 }
  99
 100 static void
 101 radeon_unmap_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
 102 {
 103         GLuint i;
 104
 105         radeon_print(RADEON_MEMORY, RADEON_TRACE,
 106                 "%s( %p , fb %p)\n",
 107                      __func__, ctx, fb);
 108
 109         /* check for render to textures */
 110         for (i = 0; i < BUFFER_COUNT; i++)
 111                 radeon_renderbuffer_unmap(ctx, fb->Attachment[i].Renderbuffer);
 112
 113         radeon_check_front_buffer_rendering(ctx);
 114 }
 115
 116 static void radeonSpanRenderStart(struct gl_context * ctx)
 117 {
 118         radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
 119         int i;
 120
 121         radeon_firevertices(rmesa);
 122
 123         for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
 124                 if (ctx->Texture.Unit[i]._ReallyEnabled) {
 125                         radeon_validate_texture_miptree(ctx, ctx->Texture.Unit[i]._Current);
 126                         radeon_swrast_map_texture_images(ctx, ctx->Texture.Unit[i]._Current);
 127                 }
 128         }
 129
 130         radeon_map_framebuffer(ctx, ctx->DrawBuffer);
 131         if (ctx->ReadBuffer != ctx->DrawBuffer)
 132                 radeon_map_framebuffer(ctx, ctx->ReadBuffer);
 133 }
 134
 135 static void radeonSpanRenderFinish(struct gl_context * ctx)
 136 {
 137         int i;
 138
 139         _swrast_flush(ctx);
 140
 141         for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++)
 142                 if (ctx->Texture.Unit[i]._ReallyEnabled)
 143                         radeon_swrast_unmap_texture_images(ctx, ctx->Texture.Unit[i]._Current);
 144
 145         radeon_unmap_framebuffer(ctx, ctx->DrawBuffer);
 146         if (ctx->ReadBuffer != ctx->DrawBuffer)
 147                 radeon_unmap_framebuffer(ctx, ctx->ReadBuffer);
 148 }
 149
 150 void radeonInitSpanFuncs(struct gl_context * ctx)
 151 {
 152         struct swrast_device_driver *swdd =
 153             _swrast_GetDeviceDriverReference(ctx);
 154         swdd->SpanRenderStart = radeonSpanRenderStart;
 155         swdd->SpanRenderFinish = radeonSpanRenderFinish;
 156 }
 157