1/**************************************************************************
2
3Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
4Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
5                     VA Linux Systems Inc., Fremont, California.
6
7The Weather Channel (TM) funded Tungsten Graphics to develop the
8initial release of the Radeon 8500 driver under the XFree86 license.
9This notice must be preserved.
10
11All Rights Reserved.
12
13Permission is hereby granted, free of charge, to any person obtaining
14a copy of this software and associated documentation files (the
15"Software"), to deal in the Software without restriction, including
16without limitation the rights to use, copy, modify, merge, publish,
17distribute, sublicense, and/or sell copies of the Software, and to
18permit persons to whom the Software is furnished to do so, subject to
19the following conditions:
20
21The above copyright notice and this permission notice (including the
22next paragraph) shall be included in all copies or substantial
23portions of the Software.
24
25THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
28IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
29LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
30OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
31WITH 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
54static void
55radeon_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
74static void
75radeon_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
87static void
88radeon_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
103static void
104radeon_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
119static 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
132static 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
142void 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
150