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 "swrast/swrast.h"
  48 #include "swrast/s_renderbuffer.h"
  49
  50 #include "radeon_common.h"
  51 #include "radeon_span.h"
  52
  53
  54 static void
  55 radeon_renderbuffer_map(struct gl_context *ctx, struct gl_renderbuffer *rb)
  56 {
  57         struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
  58         GLubyte *map;
  59         int stride;
  60
  61         if (!rb || !rrb)
  62                 return;
  63
  64         ctx->Driver.MapRenderbuffer(ctx, rb, 0, 0, rb->Width, rb->Height,
  65                                     GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
  66                                     &map, &stride);
  67
  68         rrb->base.Map = map;
  69         rrb->base.RowStride = stride;
  70         /* No floating point color buffers, use GLubytes */
  71         rrb->base.ColorType = GL_UNSIGNED_BYTE;
  72 }
  73
  74 static void
  75 radeon_renderbuffer_unmap(struct gl_context *ctx, struct gl_renderbuffer *rb)
  76 {
  77         struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
  78         if (!rb || !rrb)
  79                 return;
  80
  81         ctx->Driver.UnmapRenderbuffer(ctx, rb);
  82
  83         rrb->base.Map = NULL;
  84         rrb->base.RowStride = 0;
  85 }
  86
  87 static void
  88 radeon_map_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
  89 {
  90         GLuint i;
  91
  92         radeon_print(RADEON_MEMORY, RADEON_TRACE,
  93                 "%s( %p , fb %p )\n",
  94                      __func__, ctx, fb);
  95
  96         /* check for render to textures */
  97         for (i = 0; i < BUFFER_COUNT; i++)
  98                 radeon_renderbuffer_map(ctx, fb->Attachment[i].Renderbuffer);
  99
 100         radeon_check_front_buffer_rendering(ctx);
 101 }
 102
 103 static void
 104 radeon_unmap_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
 105 {
 106         GLuint i;
 107
 108         radeon_print(RADEON_MEMORY, RADEON_TRACE,
 109                 "%s( %p , fb %p)\n",
 110                      __func__, ctx, fb);
 111
 112         /* check for render to textures */
 113         for (i = 0; i < BUFFER_COUNT; i++)
 114                 radeon_renderbuffer_unmap(ctx, fb->Attachment[i].Renderbuffer);
 115
 116         radeon_check_front_buffer_rendering(ctx);
 117 }
 118
 119 static void radeonSpanRenderStart(struct gl_context * ctx)
 120 {
 121         radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
 122
 123         radeon_firevertices(rmesa);
 124
 125         _swrast_map_textures(ctx);
 126
 127         radeon_map_framebuffer(ctx, ctx->DrawBuffer);
 128         if (ctx->ReadBuffer != ctx->DrawBuffer)
 129                 radeon_map_framebuffer(ctx, ctx->ReadBuffer);
 130 }
 131
 132 static void radeonSpanRenderFinish(struct gl_context * ctx)
 133 {
 134         _swrast_flush(ctx);
 135         _swrast_unmap_textures(ctx);
 136
 137         radeon_unmap_framebuffer(ctx, ctx->DrawBuffer);
 138         if (ctx->ReadBuffer != ctx->DrawBuffer)
 139                 radeon_unmap_framebuffer(ctx, ctx->ReadBuffer);
 140 }
 141
 142 void radeonInitSpanFuncs(struct gl_context * ctx)
 143 {
 144         struct swrast_device_driver *swdd =
 145             _swrast_GetDeviceDriverReference(ctx);
 146         swdd->SpanRenderStart = radeonSpanRenderStart;
 147         swdd->SpanRenderFinish = radeonSpanRenderFinish;
 148 }
 149