1 /*
2  * Copyright (C) 2009 Francisco Jerez.
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial
15  * portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  *
25  */
26 
27 #include "nouveau_driver.h"
28 #include "nouveau_context.h"
29 #include "nouveau_fbo.h"
30 #include "nouveau_util.h"
31 #include "nv04_3d.xml.h"
32 #include "nv04_driver.h"
33 
34 static inline unsigned
35 get_rt_format(mesa_format format)
36 {
37 	switch (format) {
38 	case MESA_FORMAT_B8G8R8X8_UNORM:
39 		return NV04_CONTEXT_SURFACES_3D_FORMAT_COLOR_X8R8G8B8_X8R8G8B8;
40 	case MESA_FORMAT_B8G8R8A8_UNORM:
41 		return NV04_CONTEXT_SURFACES_3D_FORMAT_COLOR_A8R8G8B8;
42 	case MESA_FORMAT_B5G6R5_UNORM:
43 		return NV04_CONTEXT_SURFACES_3D_FORMAT_COLOR_R5G6B5;
44 	default:
45 		assert(0);
46 	}
47 }
48 
49 void
50 nv04_emit_framebuffer(struct gl_context *ctx, int emit)
51 {
52 	struct nouveau_pushbuf *push = context_push(ctx);
53 	struct gl_framebuffer *fb = ctx->DrawBuffer;
54 	struct nouveau_surface *s;
55 	uint32_t rt_format = NV04_CONTEXT_SURFACES_3D_FORMAT_TYPE_PITCH;
56 	uint32_t rt_pitch = 0, zeta_pitch = 0;
57 	unsigned bo_flags = NOUVEAU_BO_VRAM | NOUVEAU_BO_RDWR;
58 
59 	if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT)
60 		return;
61 
62 	PUSH_RESET(push, BUFCTX_FB);
63 
64 	/* Render target */
65 	if (fb->_ColorDrawBuffers[0]) {
66 		s = &to_nouveau_renderbuffer(
67 			fb->_ColorDrawBuffers[0])->surface;
68 
69 		rt_format |= get_rt_format(s->format);
70 		zeta_pitch = rt_pitch = s->pitch;
71 
72 		BEGIN_NV04(push, NV04_SF3D(OFFSET_COLOR), 1);
73 		PUSH_MTHDl(push, NV04_SF3D(OFFSET_COLOR), BUFCTX_FB,
74 				 s->bo, 0, bo_flags);
75 	}
76 
77 	/* depth/stencil */
78 	if (fb->Attachment[BUFFER_DEPTH].Renderbuffer) {
79 		s = &to_nouveau_renderbuffer(
80 			fb->Attachment[BUFFER_DEPTH].Renderbuffer)->surface;
81 
82 		zeta_pitch = s->pitch;
83 
84 		BEGIN_NV04(push, NV04_SF3D(OFFSET_ZETA), 1);
85 		PUSH_MTHDl(push, NV04_SF3D(OFFSET_ZETA), BUFCTX_FB,
86 				 s->bo, 0, bo_flags);
87 	}
88 
89 	BEGIN_NV04(push, NV04_SF3D(FORMAT), 1);
90 	PUSH_DATA (push, rt_format);
91 	BEGIN_NV04(push, NV04_SF3D(PITCH), 1);
92 	PUSH_DATA (push, zeta_pitch << 16 | rt_pitch);
93 
94 	/* Recompute the scissor state. */
95 	context_dirty(ctx, SCISSOR);
96 	context_dirty(ctx, CONTROL);
97 }
98 
99 void
100 nv04_emit_scissor(struct gl_context *ctx, int emit)
101 {
102 	struct nouveau_pushbuf *push = context_push(ctx);
103 	int x, y, w, h;
104 
105 	get_scissors(ctx->DrawBuffer, &x, &y, &w, &h);
106 
107 	BEGIN_NV04(push, NV04_SF3D(CLIP_HORIZONTAL), 2);
108 	PUSH_DATA (push, w << 16 | x);
109 	PUSH_DATA (push, h << 16 | y);
110 }
111