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 <keith@tungstengraphics.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	int i;
123
124	radeon_firevertices(rmesa);
125
126	for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
127		if (ctx->Texture.Unit[i]._ReallyEnabled) {
128			radeon_validate_texture_miptree(ctx, _mesa_get_samplerobj(ctx, i),
129							ctx->Texture.Unit[i]._Current);
130			radeon_swrast_map_texture_images(ctx, ctx->Texture.Unit[i]._Current);
131		}
132	}
133
134	radeon_map_framebuffer(ctx, ctx->DrawBuffer);
135	if (ctx->ReadBuffer != ctx->DrawBuffer)
136		radeon_map_framebuffer(ctx, ctx->ReadBuffer);
137}
138
139static void radeonSpanRenderFinish(struct gl_context * ctx)
140{
141	int i;
142
143	_swrast_flush(ctx);
144
145	for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++)
146		if (ctx->Texture.Unit[i]._ReallyEnabled)
147			radeon_swrast_unmap_texture_images(ctx, ctx->Texture.Unit[i]._Current);
148
149	radeon_unmap_framebuffer(ctx, ctx->DrawBuffer);
150	if (ctx->ReadBuffer != ctx->DrawBuffer)
151		radeon_unmap_framebuffer(ctx, ctx->ReadBuffer);
152}
153
154void radeonInitSpanFuncs(struct gl_context * ctx)
155{
156	struct swrast_device_driver *swdd =
157	    _swrast_GetDeviceDriverReference(ctx);
158	swdd->SpanRenderStart = radeonSpanRenderStart;
159	swdd->SpanRenderFinish = radeonSpanRenderFinish;
160}
161
162