glamor_tile.c 4.65 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/*
 * Copyright © 2009 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *
 */

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include "glamor_priv.h"

/** @file glamor_tile.c
 *
 * Implements the basic fill-with-a-tile support used by multiple GC ops.
 */

void
glamor_init_tile_shader(ScreenPtr screen)
{
    glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
    const char *tile_vs =
	"uniform float x_bias;\n"
	"uniform float x_scale;\n"
	"uniform float y_bias;\n"
	"uniform float y_scale;\n"
	"void main()\n"
	"{\n"
	"	gl_Position = vec4((gl_Vertex.x + x_bias) * x_scale,\n"
	"			   (gl_Vertex.y + y_bias) * y_scale,\n"
	"			   0,\n"
	"			   1);\n"
	"	gl_TexCoord[0] = vec4(gl_MultiTexCoord0.xy, 0, 1);\n"
	"}\n";
    const char *tile_fs =
	"uniform sampler2D sampler;\n"
	"void main()\n"
	"{\n"
	"	gl_FragColor = texture2D(sampler, gl_TexCoord[0].xy);\n"
	"}\n";
    GLint fs_prog, vs_prog;
    GLint sampler_uniform_location;

    if (!GLEW_ARB_fragment_shader)
	return;

    glamor_priv->tile_prog = glCreateProgramObjectARB();
    vs_prog = glamor_compile_glsl_prog(GL_VERTEX_SHADER_ARB, tile_vs);
    fs_prog = glamor_compile_glsl_prog(GL_FRAGMENT_SHADER_ARB, tile_fs);
    glAttachObjectARB(glamor_priv->tile_prog, vs_prog);
    glAttachObjectARB(glamor_priv->tile_prog, fs_prog);
    glamor_link_glsl_prog(glamor_priv->tile_prog);

    sampler_uniform_location =
	glGetUniformLocationARB(glamor_priv->tile_prog, "sampler");
    glUseProgramObjectARB(glamor_priv->tile_prog);
    glUniform1iARB(sampler_uniform_location, 0);
    glamor_get_transform_uniform_locations(glamor_priv->tile_prog,
					   &glamor_priv->tile_transform);
}

void
glamor_tile(PixmapPtr pixmap, PixmapPtr tile,
	    int x, int y, int width, int height,
	    unsigned char alu, unsigned long planemask,
	    int tile_x, int tile_y)
{
    ScreenPtr screen = pixmap->drawable.pScreen;
    glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
    int x1 = x;
    int x2 = x + width;
    int y1 = y;
    int y2 = y + height;
    int tile_x1 = tile_x + tile->screen_x;
    int tile_x2 = tile_x + tile->screen_x + width;
    int tile_y1 = tile_y + tile->screen_y;
    int tile_y2 = tile_y + tile->screen_y + height;
    glamor_pixmap_private *tile_priv = glamor_get_pixmap_private(tile);

    if (glamor_priv->tile_prog == 0) {
	ErrorF("Tiling unsupported\n");
	goto fail;
    }

    if (!glamor_set_destination_pixmap(pixmap))
	goto fail;
    if (tile_priv->fb == 0) {
	ErrorF("Non-FBO tile pixmap\n");
	goto fail;
    }
    if (alu != GXcopy) {
	ErrorF("tile alu\n");
	goto fail;
    }
    if (!glamor_pm_is_solid(&pixmap->drawable, planemask)) {
	ErrorF("tile pm\n");
	goto fail;
    }

    glUseProgramObjectARB(glamor_priv->tile_prog);
    glamor_set_transform_for_pixmap(pixmap, &glamor_priv->tile_transform);

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, tile_priv->tex);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glEnable(GL_TEXTURE_2D);

    tile_x += tile->screen_x;
    tile_y += tile->screen_y;

    glBegin(GL_TRIANGLE_FAN);
    glMultiTexCoord2f(0, tile_x1, tile_y1);
    glVertex2f(x1, y1);
    glMultiTexCoord2f(0, tile_x1, tile_y2);
    glVertex2f(x1, y2);
    glMultiTexCoord2f(0, tile_x2, tile_y2);
    glVertex2f(x2, y2);
    glMultiTexCoord2f(0, tile_x2, tile_y1);
    glVertex2f(x2, y1);
    glEnd();

    glUseProgramObjectARB(0);
    glDisable(GL_TEXTURE_2D);
    return;

fail:
    glamor_solid_fail_region(pixmap, x, y, width, height);
    return;
}