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         rrb->base.Map = map;
  68         rrb->base.RowStride = stride;
  69         /* No floating point color buffers, use GLubytes */
  70         rrb->base.ColorType = GL_UNSIGNED_BYTE;
  71 }
  72
  73 static void
  74 radeon_renderbuffer_unmap(struct gl_context *ctx, struct gl_renderbuffer *rb)
  75 {
  76         struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
  77         if (!rb || !rrb)
  78                 return;
  79
  80         ctx->Driver.UnmapRenderbuffer(ctx, rb);
  81
  82         rrb->base.Map = NULL;
  83         rrb->base.RowStride = 0;
  84 }
  85
  86 static void
  87 radeon_map_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
  88 {
  89         GLuint i;
  90
  91         radeon_print(RADEON_MEMORY, RADEON_TRACE,
  92                 "%s( %p , fb %p )\n",
  93                      __func__, ctx, fb);
  94
  95         /* check for render to textures */
  96         for (i = 0; i < BUFFER_COUNT; i++)
  97                 radeon_renderbuffer_map(ctx, fb->Attachment[i].Renderbuffer);
  98
  99         radeon_check_front_buffer_rendering(ctx);
 100 }
 101
 102 static void
 103 radeon_unmap_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
 104 {
 105         GLuint i;
 106
 107         radeon_print(RADEON_MEMORY, RADEON_TRACE,
 108                 "%s( %p , fb %p)\n",
 109                      __func__, ctx, fb);
 110
 111         /* check for render to textures */
 112         for (i = 0; i < BUFFER_COUNT; i++)
 113                 radeon_renderbuffer_unmap(ctx, fb->Attachment[i].Renderbuffer);
 114
 115         radeon_check_front_buffer_rendering(ctx);
 116 }
 117
 118 static void radeonSpanRenderStart(struct gl_context * ctx)
 119 {
 120         radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
 121         int i;
 122
 123         radeon_firevertices(rmesa);
 124
 125         for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
 126                 if (ctx->Texture.Unit[i]._ReallyEnabled) {
 127                         radeon_validate_texture_miptree(ctx, ctx->Texture.Unit[i]._Current);
 128                         radeon_swrast_map_texture_images(ctx, ctx->Texture.Unit[i]._Current);
 129                 }
 130         }
 131
 132         radeon_map_framebuffer(ctx, ctx->DrawBuffer);
 133         if (ctx->ReadBuffer != ctx->DrawBuffer)
 134                 radeon_map_framebuffer(ctx, ctx->ReadBuffer);
 135 }
 136
 137 static void radeonSpanRenderFinish(struct gl_context * ctx)
 138 {
 139         int i;
 140
 141         _swrast_flush(ctx);
 142
 143         for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++)
 144                 if (ctx->Texture.Unit[i]._ReallyEnabled)
 145                         radeon_swrast_unmap_texture_images(ctx, ctx->Texture.Unit[i]._Current);
 146
 147         radeon_unmap_framebuffer(ctx, ctx->DrawBuffer);
 148         if (ctx->ReadBuffer != ctx->DrawBuffer)
 149                 radeon_unmap_framebuffer(ctx, ctx->ReadBuffer);
 150 }
 151
 152 void radeonInitSpanFuncs(struct gl_context * ctx)
 153 {
 154         struct swrast_device_driver *swdd =
 155             _swrast_GetDeviceDriverReference(ctx);
 156         swdd->SpanRenderStart = radeonSpanRenderStart;
 157         swdd->SpanRenderFinish = radeonSpanRenderFinish;
 158 }
 159