1 /**************************************************************************
2 *
3 * Copyright © 2010 Jakob Bornecrantz
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 **************************************************************************/
25
26
27 #define USE_TRACE 0
28 #define WIDTH 300
29 #define HEIGHT 300
30 #define NEAR 30
31 #define FAR 1000
32 #define FLIP 0
33
34 /* pipe_*_state structs */
35 #include "pipe/p_state.h"
36 /* pipe_context */
37 #include "pipe/p_context.h"
38 /* pipe_screen */
39 #include "pipe/p_screen.h"
40 /* PIPE_* */
41 #include "pipe/p_defines.h"
42 /* TGSI_SEMANTIC_{POSITION|GENERIC} */
43 #include "pipe/p_shader_tokens.h"
44 /* pipe_buffer_* helpers */
45 #include "util/u_inlines.h"
46
47 /* constant state object helper */
48 #include "cso_cache/cso_context.h"
49
50 /* debug_dump_surface_bmp */
51 #include "util/u_debug.h"
52 /* util_draw_vertex_buffer helper */
53 #include "util/u_draw_quad.h"
54 /* FREE & CALLOC_STRUCT */
55 #include "util/u_memory.h"
56 /* util_make_[fragment|vertex]_passthrough_shader */
57 #include "util/u_simple_shaders.h"
58 /* to get a hardware pipe driver */
59 #include "pipe-loader/pipe_loader.h"
60
61 struct program
62 {
63 struct pipe_loader_device *dev;
64 struct pipe_screen *screen;
65 struct pipe_context *pipe;
66 struct cso_context *cso;
67
68 struct pipe_blend_state blend;
69 struct pipe_depth_stencil_alpha_state depthstencil;
70 struct pipe_rasterizer_state rasterizer;
71 struct pipe_viewport_state viewport;
72 struct pipe_framebuffer_state framebuffer;
73 struct pipe_vertex_element velem[2];
74
75 void *vs;
76 void *fs;
77
78 union pipe_color_union clear_color;
79
80 struct pipe_resource *vbuf;
81 struct pipe_resource *target;
82 };
83
init_prog(struct program * p)84 static void init_prog(struct program *p)
85 {
86 struct pipe_surface surf_tmpl;
87 int ret;
88
89 /* find a hardware device */
90 ret = pipe_loader_probe(&p->dev, 1);
91 assert(ret);
92
93 /* init a pipe screen */
94 p->screen = pipe_loader_create_screen(p->dev, PIPE_SEARCH_DIR);
95 assert(p->screen);
96
97 /* create the pipe driver context and cso context */
98 p->pipe = p->screen->context_create(p->screen, NULL);
99 p->cso = cso_create_context(p->pipe);
100
101 /* set clear color */
102 p->clear_color.f[0] = 0.3;
103 p->clear_color.f[1] = 0.1;
104 p->clear_color.f[2] = 0.3;
105 p->clear_color.f[3] = 1.0;
106
107 /* vertex buffer */
108 {
109 float vertices[4][2][4] = {
110 {
111 { 0.0f, -0.9f, 0.0f, 1.0f },
112 { 1.0f, 0.0f, 0.0f, 1.0f }
113 },
114 {
115 { -0.9f, 0.9f, 0.0f, 1.0f },
116 { 0.0f, 1.0f, 0.0f, 1.0f }
117 },
118 {
119 { 0.9f, 0.9f, 0.0f, 1.0f },
120 { 0.0f, 0.0f, 1.0f, 1.0f }
121 }
122 };
123
124 p->vbuf = pipe_buffer_create(p->screen, PIPE_BIND_VERTEX_BUFFER,
125 PIPE_USAGE_STATIC, sizeof(vertices));
126 pipe_buffer_write(p->pipe, p->vbuf, 0, sizeof(vertices), vertices);
127 }
128
129 /* render target texture */
130 {
131 struct pipe_resource tmplt;
132 memset(&tmplt, 0, sizeof(tmplt));
133 tmplt.target = PIPE_TEXTURE_2D;
134 tmplt.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */
135 tmplt.width0 = WIDTH;
136 tmplt.height0 = HEIGHT;
137 tmplt.depth0 = 1;
138 tmplt.array_size = 1;
139 tmplt.last_level = 0;
140 tmplt.bind = PIPE_BIND_RENDER_TARGET;
141
142 p->target = p->screen->resource_create(p->screen, &tmplt);
143 }
144
145 /* disabled blending/masking */
146 memset(&p->blend, 0, sizeof(p->blend));
147 p->blend.rt[0].colormask = PIPE_MASK_RGBA;
148
149 /* no-op depth/stencil/alpha */
150 memset(&p->depthstencil, 0, sizeof(p->depthstencil));
151
152 /* rasterizer */
153 memset(&p->rasterizer, 0, sizeof(p->rasterizer));
154 p->rasterizer.cull_face = PIPE_FACE_NONE;
155 p->rasterizer.gl_rasterization_rules = 1;
156 p->rasterizer.depth_clip = 1;
157
158 surf_tmpl.format = PIPE_FORMAT_B8G8R8A8_UNORM;
159 surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
160 surf_tmpl.u.tex.level = 0;
161 surf_tmpl.u.tex.first_layer = 0;
162 surf_tmpl.u.tex.last_layer = 0;
163 /* drawing destination */
164 memset(&p->framebuffer, 0, sizeof(p->framebuffer));
165 p->framebuffer.width = WIDTH;
166 p->framebuffer.height = HEIGHT;
167 p->framebuffer.nr_cbufs = 1;
168 p->framebuffer.cbufs[0] = p->pipe->create_surface(p->pipe, p->target, &surf_tmpl);
169
170 /* viewport, depth isn't really needed */
171 {
172 float x = 0;
173 float y = 0;
174 float z = FAR;
175 float half_width = (float)WIDTH / 2.0f;
176 float half_height = (float)HEIGHT / 2.0f;
177 float half_depth = ((float)FAR - (float)NEAR) / 2.0f;
178 float scale, bias;
179
180 if (FLIP) {
181 scale = -1.0f;
182 bias = (float)HEIGHT;
183 } else {
184 scale = 1.0f;
185 bias = 0.0f;
186 }
187
188 p->viewport.scale[0] = half_width;
189 p->viewport.scale[1] = half_height * scale;
190 p->viewport.scale[2] = half_depth;
191 p->viewport.scale[3] = 1.0f;
192
193 p->viewport.translate[0] = half_width + x;
194 p->viewport.translate[1] = (half_height + y) * scale + bias;
195 p->viewport.translate[2] = half_depth + z;
196 p->viewport.translate[3] = 0.0f;
197 }
198
199 /* vertex elements state */
200 memset(p->velem, 0, sizeof(p->velem));
201 p->velem[0].src_offset = 0 * 4 * sizeof(float); /* offset 0, first element */
202 p->velem[0].instance_divisor = 0;
203 p->velem[0].vertex_buffer_index = 0;
204 p->velem[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
205
206 p->velem[1].src_offset = 1 * 4 * sizeof(float); /* offset 16, second element */
207 p->velem[1].instance_divisor = 0;
208 p->velem[1].vertex_buffer_index = 0;
209 p->velem[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
210
211 /* vertex shader */
212 {
213 const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
214 TGSI_SEMANTIC_COLOR };
215 const uint semantic_indexes[] = { 0, 0 };
216 p->vs = util_make_vertex_passthrough_shader(p->pipe, 2, semantic_names, semantic_indexes);
217 }
218
219 /* fragment shader */
220 p->fs = util_make_fragment_passthrough_shader(p->pipe);
221 }
222
close_prog(struct program * p)223 static void close_prog(struct program *p)
224 {
225 /* unset all state */
226 cso_release_all(p->cso);
227
228 p->pipe->delete_vs_state(p->pipe, p->vs);
229 p->pipe->delete_fs_state(p->pipe, p->fs);
230
231 pipe_surface_reference(&p->framebuffer.cbufs[0], NULL);
232 pipe_resource_reference(&p->target, NULL);
233 pipe_resource_reference(&p->vbuf, NULL);
234
235 cso_destroy_context(p->cso);
236 p->pipe->destroy(p->pipe);
237 p->screen->destroy(p->screen);
238 pipe_loader_release(&p->dev, 1);
239
240 FREE(p);
241 }
242
draw(struct program * p)243 static void draw(struct program *p)
244 {
245 /* set the render target */
246 cso_set_framebuffer(p->cso, &p->framebuffer);
247
248 /* clear the render target */
249 p->pipe->clear(p->pipe, PIPE_CLEAR_COLOR, &p->clear_color, 0, 0);
250
251 /* set misc state we care about */
252 cso_set_blend(p->cso, &p->blend);
253 cso_set_depth_stencil_alpha(p->cso, &p->depthstencil);
254 cso_set_rasterizer(p->cso, &p->rasterizer);
255 cso_set_viewport(p->cso, &p->viewport);
256
257 /* shaders */
258 cso_set_fragment_shader_handle(p->cso, p->fs);
259 cso_set_vertex_shader_handle(p->cso, p->vs);
260
261 /* vertex element data */
262 cso_set_vertex_elements(p->cso, 2, p->velem);
263
264 util_draw_vertex_buffer(p->pipe, p->cso,
265 p->vbuf, 0,
266 PIPE_PRIM_TRIANGLES,
267 3, /* verts */
268 2); /* attribs/vert */
269
270 p->pipe->flush(p->pipe, NULL);
271
272 debug_dump_surface_bmp(p->pipe, "result.bmp", p->framebuffer.cbufs[0]);
273 }
274
main(int argc,char ** argv)275 int main(int argc, char** argv)
276 {
277 struct program *p = CALLOC_STRUCT(program);
278
279 init_prog(p);
280 draw(p);
281 close_prog(p);
282
283 return 0;
284 }
285