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
radeon_renderbuffer_map(struct gl_context * ctx,struct gl_renderbuffer * rb)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
radeon_renderbuffer_unmap(struct gl_context * ctx,struct gl_renderbuffer * rb)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
radeon_map_framebuffer(struct gl_context * ctx,struct gl_framebuffer * fb)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
radeon_unmap_framebuffer(struct gl_context * ctx,struct gl_framebuffer * fb)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
radeonSpanRenderStart(struct gl_context * ctx)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
radeonSpanRenderFinish(struct gl_context * ctx)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
radeonInitSpanFuncs(struct gl_context * ctx)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
150