quad-tex.c revision 01e04c3f 
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 0
31#define FAR 1
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/* u_sampler_view_default_template */
51#include "util/u_sampler.h"
52/* debug_dump_surface_bmp */
53#include "util/u_debug_image.h"
54/* util_draw_vertex_buffer helper */
55#include "util/u_draw_quad.h"
56/* FREE & CALLOC_STRUCT */
57#include "util/u_memory.h"
58/* util_make_[fragment|vertex]_passthrough_shader */
59#include "util/u_simple_shaders.h"
60/* to get a hardware pipe driver */
61#include "pipe-loader/pipe_loader.h"
62
63struct program
64{
65	struct pipe_loader_device *dev;
66	struct pipe_screen *screen;
67	struct pipe_context *pipe;
68	struct cso_context *cso;
69
70	struct pipe_blend_state blend;
71	struct pipe_depth_stencil_alpha_state depthstencil;
72	struct pipe_rasterizer_state rasterizer;
73	struct pipe_sampler_state sampler;
74	struct pipe_viewport_state viewport;
75	struct pipe_framebuffer_state framebuffer;
76	struct pipe_vertex_element velem[2];
77
78	void *vs;
79	void *fs;
80
81	union pipe_color_union clear_color;
82
83	struct pipe_resource *vbuf;
84	struct pipe_resource *target;
85	struct pipe_resource *tex;
86	struct pipe_sampler_view *view;
87};
88
89static void init_prog(struct program *p)
90{
91	struct pipe_surface surf_tmpl;
92	int ret;
93
94	/* find a hardware device */
95	ret = pipe_loader_probe(&p->dev, 1);
96	assert(ret);
97
98	/* init a pipe screen */
99	p->screen = pipe_loader_create_screen(p->dev);
100	assert(p->screen);
101
102	/* create the pipe driver context and cso context */
103	p->pipe = p->screen->context_create(p->screen, NULL, 0);
104	p->cso = cso_create_context(p->pipe, 0);
105
106	/* set clear color */
107	p->clear_color.f[0] = 0.3;
108	p->clear_color.f[1] = 0.1;
109	p->clear_color.f[2] = 0.3;
110	p->clear_color.f[3] = 1.0;
111
112	/* vertex buffer */
113	{
114		float vertices[4][2][4] = {
115			{
116				{ 0.9f, 0.9f, 0.0f, 1.0f },
117				{ 1.0f, 1.0f, 0.0f, 1.0f }
118			},
119			{
120				{ -0.9f, 0.9f, 0.0f, 1.0f },
121				{  0.0f, 1.0f, 0.0f, 1.0f }
122			},
123			{
124				{ -0.9f, -0.9f, 0.0f, 1.0f },
125				{  0.0f,  0.0f, 1.0f, 1.0f }
126			},
127			{
128				{ 0.9f, -0.9f, 0.0f, 1.0f },
129				{ 1.0f,  0.0f, 1.0f, 1.0f }
130			}
131		};
132
133		p->vbuf = pipe_buffer_create(p->screen, PIPE_BIND_VERTEX_BUFFER,
134					     PIPE_USAGE_DEFAULT, sizeof(vertices));
135		pipe_buffer_write(p->pipe, p->vbuf, 0, sizeof(vertices), vertices);
136	}
137
138	/* render target texture */
139	{
140		struct pipe_resource tmplt;
141		memset(&tmplt, 0, sizeof(tmplt));
142		tmplt.target = PIPE_TEXTURE_2D;
143		tmplt.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */
144		tmplt.width0 = WIDTH;
145		tmplt.height0 = HEIGHT;
146		tmplt.depth0 = 1;
147		tmplt.array_size = 1;
148		tmplt.last_level = 0;
149		tmplt.bind = PIPE_BIND_RENDER_TARGET;
150
151		p->target = p->screen->resource_create(p->screen, &tmplt);
152	}
153
154	/* sampler texture */
155	{
156		uint32_t *ptr;
157		struct pipe_transfer *t;
158		struct pipe_resource t_tmplt;
159		struct pipe_sampler_view v_tmplt;
160		struct pipe_box box;
161
162		memset(&t_tmplt, 0, sizeof(t_tmplt));
163		t_tmplt.target = PIPE_TEXTURE_2D;
164		t_tmplt.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */
165		t_tmplt.width0 = 2;
166		t_tmplt.height0 = 2;
167		t_tmplt.depth0 = 1;
168		t_tmplt.array_size = 1;
169		t_tmplt.last_level = 0;
170		t_tmplt.bind = PIPE_BIND_RENDER_TARGET;
171
172		p->tex = p->screen->resource_create(p->screen, &t_tmplt);
173
174		memset(&box, 0, sizeof(box));
175		box.width = 2;
176		box.height = 2;
177		box.depth = 1;
178
179		ptr = p->pipe->transfer_map(p->pipe, p->tex, 0, PIPE_TRANSFER_WRITE, &box, &t);
180		ptr[0] = 0xffff0000;
181		ptr[1] = 0xff0000ff;
182		ptr[2] = 0xff00ff00;
183		ptr[3] = 0xffffff00;
184		p->pipe->transfer_unmap(p->pipe, t);
185
186		u_sampler_view_default_template(&v_tmplt, p->tex, p->tex->format);
187
188		p->view = p->pipe->create_sampler_view(p->pipe, p->tex, &v_tmplt);
189	}
190
191	/* disabled blending/masking */
192	memset(&p->blend, 0, sizeof(p->blend));
193	p->blend.rt[0].colormask = PIPE_MASK_RGBA;
194
195	/* no-op depth/stencil/alpha */
196	memset(&p->depthstencil, 0, sizeof(p->depthstencil));
197
198	/* rasterizer */
199	memset(&p->rasterizer, 0, sizeof(p->rasterizer));
200	p->rasterizer.cull_face = PIPE_FACE_NONE;
201	p->rasterizer.half_pixel_center = 1;
202	p->rasterizer.bottom_edge_rule = 1;
203	p->rasterizer.depth_clip_near = 1;
204	p->rasterizer.depth_clip_far = 1;
205
206	/* sampler */
207	memset(&p->sampler, 0, sizeof(p->sampler));
208	p->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
209	p->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
210	p->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
211	p->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
212	p->sampler.min_img_filter = PIPE_TEX_MIPFILTER_LINEAR;
213	p->sampler.mag_img_filter = PIPE_TEX_MIPFILTER_LINEAR;
214	p->sampler.normalized_coords = 1;
215
216	surf_tmpl.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */
217	surf_tmpl.u.tex.level = 0;
218	surf_tmpl.u.tex.first_layer = 0;
219	surf_tmpl.u.tex.last_layer = 0;
220	/* drawing destination */
221	memset(&p->framebuffer, 0, sizeof(p->framebuffer));
222	p->framebuffer.width = WIDTH;
223	p->framebuffer.height = HEIGHT;
224	p->framebuffer.nr_cbufs = 1;
225	p->framebuffer.cbufs[0] = p->pipe->create_surface(p->pipe, p->target, &surf_tmpl);
226
227	/* viewport, depth isn't really needed */
228	{
229		float x = 0;
230		float y = 0;
231		float z = NEAR;
232		float half_width = (float)WIDTH / 2.0f;
233		float half_height = (float)HEIGHT / 2.0f;
234		float half_depth = ((float)FAR - (float)NEAR) / 2.0f;
235		float scale, bias;
236
237		if (FLIP) {
238			scale = -1.0f;
239			bias = (float)HEIGHT;
240		} else {
241			scale = 1.0f;
242			bias = 0.0f;
243		}
244
245		p->viewport.scale[0] = half_width;
246		p->viewport.scale[1] = half_height * scale;
247		p->viewport.scale[2] = half_depth;
248
249		p->viewport.translate[0] = half_width + x;
250		p->viewport.translate[1] = (half_height + y) * scale + bias;
251		p->viewport.translate[2] = half_depth + z;
252	}
253
254	/* vertex elements state */
255	memset(p->velem, 0, sizeof(p->velem));
256	p->velem[0].src_offset = 0 * 4 * sizeof(float); /* offset 0, first element */
257	p->velem[0].instance_divisor = 0;
258	p->velem[0].vertex_buffer_index = 0;
259	p->velem[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
260
261	p->velem[1].src_offset = 1 * 4 * sizeof(float); /* offset 16, second element */
262	p->velem[1].instance_divisor = 0;
263	p->velem[1].vertex_buffer_index = 0;
264	p->velem[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
265
266	/* vertex shader */
267	{
268		const enum tgsi_semantic semantic_names[] =
269                   { TGSI_SEMANTIC_POSITION, TGSI_SEMANTIC_GENERIC };
270		const uint semantic_indexes[] = { 0, 0 };
271		p->vs = util_make_vertex_passthrough_shader(p->pipe, 2, semantic_names, semantic_indexes, FALSE);
272	}
273
274	/* fragment shader */
275	p->fs = util_make_fragment_tex_shader(p->pipe, TGSI_TEXTURE_2D,
276	                                      TGSI_INTERPOLATE_LINEAR,
277	                                      TGSI_RETURN_TYPE_FLOAT,
278	                                      TGSI_RETURN_TYPE_FLOAT, false,
279                                              false);
280}
281
282static void close_prog(struct program *p)
283{
284	cso_destroy_context(p->cso);
285
286	p->pipe->delete_vs_state(p->pipe, p->vs);
287	p->pipe->delete_fs_state(p->pipe, p->fs);
288
289	pipe_surface_reference(&p->framebuffer.cbufs[0], NULL);
290	pipe_sampler_view_reference(&p->view, NULL);
291	pipe_resource_reference(&p->target, NULL);
292	pipe_resource_reference(&p->tex, NULL);
293	pipe_resource_reference(&p->vbuf, NULL);
294
295	p->pipe->destroy(p->pipe);
296	p->screen->destroy(p->screen);
297	pipe_loader_release(&p->dev, 1);
298
299	FREE(p);
300}
301
302static void draw(struct program *p)
303{
304	const struct pipe_sampler_state *samplers[] = {&p->sampler};
305
306	/* set the render target */
307	cso_set_framebuffer(p->cso, &p->framebuffer);
308
309	/* clear the render target */
310	p->pipe->clear(p->pipe, PIPE_CLEAR_COLOR, &p->clear_color, 0, 0);
311
312	/* set misc state we care about */
313	cso_set_blend(p->cso, &p->blend);
314	cso_set_depth_stencil_alpha(p->cso, &p->depthstencil);
315	cso_set_rasterizer(p->cso, &p->rasterizer);
316	cso_set_viewport(p->cso, &p->viewport);
317
318	/* sampler */
319	cso_set_samplers(p->cso, PIPE_SHADER_FRAGMENT, 1, samplers);
320
321	/* texture sampler view */
322	cso_set_sampler_views(p->cso, PIPE_SHADER_FRAGMENT, 1, &p->view);
323
324	/* shaders */
325	cso_set_fragment_shader_handle(p->cso, p->fs);
326	cso_set_vertex_shader_handle(p->cso, p->vs);
327
328	/* vertex element data */
329	cso_set_vertex_elements(p->cso, 2, p->velem);
330
331	util_draw_vertex_buffer(p->pipe, p->cso,
332	                        p->vbuf, 0, 0,
333	                        PIPE_PRIM_QUADS,
334	                        4,  /* verts */
335	                        2); /* attribs/vert */
336
337        p->pipe->flush(p->pipe, NULL, 0);
338
339	debug_dump_surface_bmp(p->pipe, "result.bmp", p->framebuffer.cbufs[0]);
340}
341
342int main(int argc, char** argv)
343{
344	struct program *p = CALLOC_STRUCT(program);
345
346	init_prog(p);
347	draw(p);
348	close_prog(p);
349
350	return 0;
351}
352