radeon_span.c revision 0e893b42610a2e8f2797bd7da68669dac38d9538 
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 "swrast/swrast.h"
47#include "swrast/s_renderbuffer.h"
48
49#include "radeon_common.h"
50#include "radeon_span.h"
51
52
53static void
54radeon_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
73static void
74radeon_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
86static void
87radeon_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
102static void
103radeon_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
118static 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
137static 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
152void 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
160