1 /**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 /* Authors:
29 * Brian Paul
30 */
31
32
33 #include "util/u_clear.h"
34 #include "util/u_format.h"
35 #include "util/u_pack_color.h"
36 #include "i915_context.h"
37 #include "i915_screen.h"
38 #include "i915_reg.h"
39 #include "i915_batch.h"
40 #include "i915_resource.h"
41 #include "i915_state.h"
42
43 void
i915_clear_emit(struct pipe_context * pipe,unsigned buffers,const union pipe_color_union * color,double depth,unsigned stencil,unsigned destx,unsigned desty,unsigned width,unsigned height)44 i915_clear_emit(struct pipe_context *pipe, unsigned buffers,
45 const union pipe_color_union *color,
46 double depth, unsigned stencil,
47 unsigned destx, unsigned desty, unsigned width, unsigned height)
48 {
49 struct i915_context *i915 = i915_context(pipe);
50 uint32_t clear_params, clear_color, clear_depth, clear_stencil,
51 clear_color8888, packed_z_stencil;
52 union util_color u_color;
53 float f_depth = depth;
54 struct i915_texture *cbuf_tex, *depth_tex;
55 int depth_clear_bbp, color_clear_bbp;
56
57 cbuf_tex = depth_tex = NULL;
58 clear_params = 0;
59 depth_clear_bbp = color_clear_bbp = 0;
60
61 if (buffers & PIPE_CLEAR_COLOR) {
62 struct pipe_surface *cbuf = i915->framebuffer.cbufs[0];
63
64 clear_params |= CLEARPARAM_WRITE_COLOR;
65 cbuf_tex = i915_texture(cbuf->texture);
66
67 util_pack_color(color->f, cbuf->format, &u_color);
68 if (util_format_get_blocksize(cbuf_tex->b.b.format) == 4) {
69 clear_color = u_color.ui;
70 color_clear_bbp = 32;
71 } else {
72 clear_color = (u_color.ui & 0xffff) | (u_color.ui << 16);
73 color_clear_bbp = 16;
74 }
75
76 /* correctly swizzle clear value */
77 if (i915->current.target_fixup_format)
78 util_pack_color(color->f, cbuf->format, &u_color);
79 else
80 util_pack_color(color->f, PIPE_FORMAT_B8G8R8A8_UNORM, &u_color);
81 clear_color8888 = u_color.ui;
82 } else
83 clear_color = clear_color8888 = 0;
84
85 clear_depth = clear_stencil = 0;
86 if (buffers & PIPE_CLEAR_DEPTH) {
87 struct pipe_surface *zbuf = i915->framebuffer.zsbuf;
88
89 clear_params |= CLEARPARAM_WRITE_DEPTH;
90 depth_tex = i915_texture(zbuf->texture);
91 packed_z_stencil = util_pack_z_stencil(depth_tex->b.b.format, depth, stencil);
92
93 if (util_format_get_blocksize(depth_tex->b.b.format) == 4) {
94 /* Avoid read-modify-write if there's no stencil. */
95 if (buffers & PIPE_CLEAR_STENCIL
96 || depth_tex->b.b.format != PIPE_FORMAT_Z24_UNORM_S8_UINT) {
97 clear_params |= CLEARPARAM_WRITE_STENCIL;
98 clear_stencil = packed_z_stencil >> 24;
99 }
100
101 clear_depth = packed_z_stencil & 0xffffff;
102 depth_clear_bbp = 32;
103 } else {
104 clear_depth = (packed_z_stencil & 0xffff) | (packed_z_stencil << 16);
105 depth_clear_bbp = 16;
106 }
107 } else if (buffers & PIPE_CLEAR_STENCIL) {
108 struct pipe_surface *zbuf = i915->framebuffer.zsbuf;
109
110 clear_params |= CLEARPARAM_WRITE_STENCIL;
111 depth_tex = i915_texture(zbuf->texture);
112 assert(depth_tex->b.b.format == PIPE_FORMAT_Z24_UNORM_S8_UINT);
113
114 packed_z_stencil = util_pack_z_stencil(depth_tex->b.b.format, depth, stencil);
115 depth_clear_bbp = 32;
116 clear_stencil = packed_z_stencil >> 24;
117 }
118
119 /* hw can't fastclear both depth and color if their bbp mismatch. */
120 if (color_clear_bbp && depth_clear_bbp
121 && color_clear_bbp != depth_clear_bbp) {
122 if (i915->hardware_dirty)
123 i915_emit_hardware_state(i915);
124
125 if (!BEGIN_BATCH(1 + 2*(7 + 7))) {
126 FLUSH_BATCH(NULL);
127
128 i915_emit_hardware_state(i915);
129 i915->vbo_flushed = 1;
130
131 assert(BEGIN_BATCH(1 + 2*(7 + 7)));
132 }
133
134 OUT_BATCH(_3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT);
135
136 OUT_BATCH(_3DSTATE_CLEAR_PARAMETERS);
137 OUT_BATCH(CLEARPARAM_WRITE_COLOR | CLEARPARAM_CLEAR_RECT);
138 /* Used for zone init prim */
139 OUT_BATCH(clear_color);
140 OUT_BATCH(clear_depth);
141 /* Used for clear rect prim */
142 OUT_BATCH(clear_color8888);
143 OUT_BATCH_F(f_depth);
144 OUT_BATCH(clear_stencil);
145
146 OUT_BATCH(_3DPRIMITIVE | PRIM3D_CLEAR_RECT | 5);
147 OUT_BATCH_F(destx + width);
148 OUT_BATCH_F(desty + height);
149 OUT_BATCH_F(destx);
150 OUT_BATCH_F(desty + height);
151 OUT_BATCH_F(destx);
152 OUT_BATCH_F(desty);
153
154 OUT_BATCH(_3DSTATE_CLEAR_PARAMETERS);
155 OUT_BATCH((clear_params & ~CLEARPARAM_WRITE_COLOR) |
156 CLEARPARAM_CLEAR_RECT);
157 /* Used for zone init prim */
158 OUT_BATCH(clear_color);
159 OUT_BATCH(clear_depth);
160 /* Used for clear rect prim */
161 OUT_BATCH(clear_color8888);
162 OUT_BATCH_F(f_depth);
163 OUT_BATCH(clear_stencil);
164
165 OUT_BATCH(_3DPRIMITIVE | PRIM3D_CLEAR_RECT | 5);
166 OUT_BATCH_F(destx + width);
167 OUT_BATCH_F(desty + height);
168 OUT_BATCH_F(destx);
169 OUT_BATCH_F(desty + height);
170 OUT_BATCH_F(destx);
171 OUT_BATCH_F(desty);
172 } else {
173 if (i915->hardware_dirty)
174 i915_emit_hardware_state(i915);
175
176 if (!BEGIN_BATCH(1 + 7 + 7)) {
177 FLUSH_BATCH(NULL);
178
179 i915_emit_hardware_state(i915);
180 i915->vbo_flushed = 1;
181
182 assert(BEGIN_BATCH(1 + 7 + 7));
183 }
184
185 OUT_BATCH(_3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT);
186
187 OUT_BATCH(_3DSTATE_CLEAR_PARAMETERS);
188 OUT_BATCH(clear_params | CLEARPARAM_CLEAR_RECT);
189 /* Used for zone init prim */
190 OUT_BATCH(clear_color);
191 OUT_BATCH(clear_depth);
192 /* Used for clear rect prim */
193 OUT_BATCH(clear_color8888);
194 OUT_BATCH_F(f_depth);
195 OUT_BATCH(clear_stencil);
196
197 OUT_BATCH(_3DPRIMITIVE | PRIM3D_CLEAR_RECT | 5);
198 OUT_BATCH_F(destx + width);
199 OUT_BATCH_F(desty + height);
200 OUT_BATCH_F(destx);
201 OUT_BATCH_F(desty + height);
202 OUT_BATCH_F(destx);
203 OUT_BATCH_F(desty);
204 }
205
206 /* Flush after clear, its expected to be a costly operation.
207 * This is not required, just a heuristic, but without the flush we'd need to
208 * clobber the SCISSOR_ENABLE dynamic state. */
209 FLUSH_BATCH(NULL);
210
211 i915->last_fired_vertices = i915->fired_vertices;
212 i915->fired_vertices = 0;
213 }
214
215 /**
216 * Clear the given buffers to the specified values.
217 * No masking, no scissor (clear entire buffer).
218 */
219 void
i915_clear_blitter(struct pipe_context * pipe,unsigned buffers,const union pipe_color_union * color,double depth,unsigned stencil)220 i915_clear_blitter(struct pipe_context *pipe, unsigned buffers,
221 const union pipe_color_union *color,
222 double depth, unsigned stencil)
223 {
224 util_clear(pipe, &i915_context(pipe)->framebuffer, buffers, color, depth,
225 stencil);
226 }
227
228 void
i915_clear_render(struct pipe_context * pipe,unsigned buffers,const union pipe_color_union * color,double depth,unsigned stencil)229 i915_clear_render(struct pipe_context *pipe, unsigned buffers,
230 const union pipe_color_union *color,
231 double depth, unsigned stencil)
232 {
233 struct i915_context *i915 = i915_context(pipe);
234
235 if (i915->dirty)
236 i915_update_derived(i915);
237
238 i915_clear_emit(pipe, buffers, color, depth, stencil,
239 0, 0, i915->framebuffer.width, i915->framebuffer.height);
240 }
241