1 /* Display a cleared blue window. This demo has no dependencies on
2 * any utility code, just the graw interface and gallium.
5 #include "state_tracker/graw.h"
6 #include "pipe/p_screen.h"
7 #include "pipe/p_context.h"
8 #include "pipe/p_shader_tokens.h"
9 #include "pipe/p_state.h"
10 #include "pipe/p_defines.h"
12 #include "util/u_debug.h" /* debug_dump_surface_bmp() */
13 #include "util/u_inlines.h"
14 #include "util/u_memory.h" /* Offset() */
15 #include "util/u_draw_quad.h"
16 #include "util/u_box.h"
20 enum pipe_format formats[] = {
21 PIPE_FORMAT_R8G8B8A8_UNORM,
22 PIPE_FORMAT_B8G8R8A8_UNORM,
26 static const int WIDTH = 300;
27 static const int HEIGHT = 300;
29 static struct pipe_screen *screen = NULL;
30 static struct pipe_context *ctx = NULL;
31 static struct pipe_resource *rttex = NULL;
32 static struct pipe_resource *samptex = NULL;
33 static struct pipe_surface *surf = NULL;
34 static struct pipe_sampler_view *sv = NULL;
35 static void *sampler = NULL;
36 static void *window = NULL;
43 static struct vertex vertices[] =
45 { { 0.9, -0.9, 0.0, 1.0 },
48 { { 0.9, 0.9, 0.0, 1.0 },
51 { {-0.9, 0.9, 0.0, 1.0 },
54 { {-0.9, -0.9, 0.0, 1.0 },
61 static void set_viewport( float x, float y,
62 float width, float height,
63 float near, float far)
66 float half_width = (float)width / 2.0f;
67 float half_height = (float)height / 2.0f;
68 float half_depth = ((float)far - (float)near) / 2.0f;
69 struct pipe_viewport_state vp;
71 vp.scale[0] = half_width;
72 vp.scale[1] = half_height;
73 vp.scale[2] = half_depth;
76 vp.translate[0] = half_width + x;
77 vp.translate[1] = half_height + y;
78 vp.translate[2] = half_depth + z;
79 vp.translate[3] = 0.0f;
81 ctx->set_viewport_state( ctx, &vp );
84 static void set_vertices( void )
86 struct pipe_vertex_element ve[2];
87 struct pipe_vertex_buffer vbuf;
90 memset(ve, 0, sizeof ve);
92 ve[0].src_offset = Offset(struct vertex, position);
93 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
94 ve[1].src_offset = Offset(struct vertex, color);
95 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
97 handle = ctx->create_vertex_elements_state(ctx, 2, ve);
98 ctx->bind_vertex_elements_state(ctx, handle);
101 vbuf.stride = sizeof( struct vertex );
102 vbuf.buffer_offset = 0;
103 vbuf.buffer = screen->user_buffer_create(screen,
106 PIPE_BIND_VERTEX_BUFFER);
108 ctx->set_vertex_buffers(ctx, 1, &vbuf);
111 static void set_vertex_shader( void )
118 "DCL OUT[0], POSITION\n"
119 "DCL OUT[1], GENERIC[0]\n"
120 " 0: MOV OUT[1], IN[1]\n"
121 " 1: MOV OUT[0], IN[0]\n"
124 handle = graw_parse_vertex_shader(ctx, text);
125 ctx->bind_vs_state(ctx, handle);
128 static void set_fragment_shader( void )
133 "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
134 "DCL OUT[0], COLOR\n"
137 "DCL RES[0], 2D, FLOAT\n"
138 " 0: SAMPLE TEMP[0], IN[0], RES[0], SAMP[0]\n"
139 " 1: MOV OUT[0], TEMP[0]\n"
142 handle = graw_parse_fragment_shader(ctx, text);
143 ctx->bind_fs_state(ctx, handle);
147 static void draw( void )
149 float clear_color[4] = {.5,.5,.5,1};
151 ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
152 util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);
153 ctx->flush(ctx, NULL);
155 graw_save_surface_to_file(ctx, surf, NULL);
157 screen->flush_frontbuffer(screen, rttex, 0, 0, window);
162 static void init_tex( void )
164 struct pipe_sampler_view sv_template;
165 struct pipe_sampler_state sampler_desc;
166 struct pipe_resource templat;
168 ubyte tex2d[SIZE][SIZE][4];
172 for (s = 0; s < SIZE; s++) {
173 for (t = 0; t < SIZE; t++) {
176 tex2d[t][s][0] = (x) ? 0 : 63;
177 tex2d[t][s][1] = (x) ? 0 : 128;
179 tex2d[t][s][3] = 0xff;
182 int x = ((s ^ t) >> 2) & 1;
183 tex2d[t][s][0] = s*255/(SIZE-1);
184 tex2d[t][s][1] = t*255/(SIZE-1);
185 tex2d[t][s][2] = (x) ? 0 : 128;
186 tex2d[t][s][3] = 0xff;
192 tex2d[0][0][1] = 255;
193 tex2d[0][0][2] = 255;
198 tex2d[0][1][2] = 255;
199 tex2d[0][1][3] = 255;
201 tex2d[1][0][0] = 255;
202 tex2d[1][0][1] = 255;
204 tex2d[1][0][3] = 255;
206 tex2d[1][1][0] = 255;
209 tex2d[1][1][3] = 255;
212 templat.target = PIPE_TEXTURE_2D;
213 templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
214 templat.width0 = SIZE;
215 templat.height0 = SIZE;
217 templat.last_level = 0;
218 templat.nr_samples = 1;
219 templat.bind = PIPE_BIND_SAMPLER_VIEW;
222 samptex = screen->resource_create(screen,
227 u_box_2d(0,0,SIZE,SIZE, &box);
229 ctx->transfer_inline_write(ctx,
238 /* Possibly read back & compare against original data:
242 struct pipe_transfer *t;
244 t = pipe_get_transfer(ctx, samptex,
245 0, 0, /* level, layer */
247 0, 0, SIZE, SIZE); /* x, y, width, height */
249 ptr = ctx->transfer_map(ctx, t);
251 if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
256 ctx->transfer_unmap(ctx, t);
258 ctx->transfer_destroy(ctx, t);
261 memset(&sv_template, 0, sizeof sv_template);
262 sv_template.format = samptex->format;
263 sv_template.texture = samptex;
264 sv_template.swizzle_r = 0;
265 sv_template.swizzle_g = 1;
266 sv_template.swizzle_b = 2;
267 sv_template.swizzle_a = 3;
268 sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
272 ctx->set_fragment_sampler_views(ctx, 1, &sv);
275 memset(&sampler_desc, 0, sizeof sampler_desc);
276 sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
277 sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
278 sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
279 sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
280 sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
281 sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
282 sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
283 sampler_desc.compare_func = 0;
284 sampler_desc.normalized_coords = 1;
285 sampler_desc.max_anisotropy = 0;
287 sampler = ctx->create_sampler_state(ctx, &sampler_desc);
291 ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
295 static void init( void )
297 struct pipe_framebuffer_state fb;
298 struct pipe_resource templat;
299 struct pipe_surface surf_tmpl;
302 /* It's hard to say whether window or screen should be created
303 * first. Different environments would prefer one or the other.
305 * Also, no easy way of querying supported formats if the screen
306 * cannot be created first.
308 for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
309 screen = graw_create_window_and_screen(0, 0, 300, 300,
312 if (window && screen)
315 if (!screen || !window) {
316 fprintf(stderr, "Unable to create window\n");
320 ctx = screen->context_create(screen, NULL);
324 templat.target = PIPE_TEXTURE_2D;
325 templat.format = formats[i];
326 templat.width0 = WIDTH;
327 templat.height0 = HEIGHT;
329 templat.array_size = 1;
330 templat.last_level = 0;
331 templat.nr_samples = 1;
332 templat.bind = (PIPE_BIND_RENDER_TARGET |
333 PIPE_BIND_DISPLAY_TARGET);
335 rttex = screen->resource_create(screen,
340 surf_tmpl.format = templat.format;
341 surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
342 surf_tmpl.u.tex.level = 0;
343 surf_tmpl.u.tex.first_layer = 0;
344 surf_tmpl.u.tex.last_layer = 0;
345 surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
349 memset(&fb, 0, sizeof fb);
355 ctx->set_framebuffer_state(ctx, &fb);
358 struct pipe_blend_state blend;
360 memset(&blend, 0, sizeof blend);
361 blend.rt[0].colormask = PIPE_MASK_RGBA;
362 handle = ctx->create_blend_state(ctx, &blend);
363 ctx->bind_blend_state(ctx, handle);
367 struct pipe_depth_stencil_alpha_state depthstencil;
369 memset(&depthstencil, 0, sizeof depthstencil);
370 handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
371 ctx->bind_depth_stencil_alpha_state(ctx, handle);
375 struct pipe_rasterizer_state rasterizer;
377 memset(&rasterizer, 0, sizeof rasterizer);
378 rasterizer.cull_face = PIPE_FACE_NONE;
379 rasterizer.gl_rasterization_rules = 1;
380 handle = ctx->create_rasterizer_state(ctx, &rasterizer);
381 ctx->bind_rasterizer_state(ctx, handle);
384 set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
390 set_fragment_shader();
393 static void args(int argc, char *argv[])
397 for (i = 1; i < argc;) {
398 if (graw_parse_args(&i, argc, argv)) {
406 int main( int argc, char *argv[] )
411 graw_set_display_func( draw );