1 /* Display a cleared blue window. This demo has no dependencies on
2 * any utility code, just the graw interface and gallium.
6 #include "state_tracker/graw.h"
7 #include "pipe/p_screen.h"
8 #include "pipe/p_context.h"
9 #include "pipe/p_shader_tokens.h"
10 #include "pipe/p_state.h"
11 #include "pipe/p_defines.h"
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"
18 enum pipe_format formats[] = {
19 PIPE_FORMAT_R8G8B8A8_UNORM,
20 PIPE_FORMAT_B8G8R8A8_UNORM,
24 static const int WIDTH = 300;
25 static const int HEIGHT = 300;
27 static struct pipe_screen *screen = NULL;
28 static struct pipe_context *ctx = NULL;
29 static struct pipe_resource *rttex = NULL;
30 static struct pipe_resource *samptex = NULL;
31 static struct pipe_surface *surf = NULL;
32 static struct pipe_sampler_view *sv = NULL;
33 static void *sampler = NULL;
34 static void *window = NULL;
41 static struct vertex vertices[] =
43 { { 0.9, -0.9, 0.0, 1.0 },
46 { { 0.9, 0.9, 0.0, 1.0 },
49 { {-0.9, 0.9, 0.0, 1.0 },
52 { {-0.9, -0.9, 0.0, 1.0 },
59 static void set_viewport( float x, float y,
60 float width, float height,
61 float near, float far)
64 float half_width = (float)width / 2.0f;
65 float half_height = (float)height / 2.0f;
66 float half_depth = ((float)far - (float)near) / 2.0f;
67 struct pipe_viewport_state vp;
69 vp.scale[0] = half_width;
70 vp.scale[1] = half_height;
71 vp.scale[2] = half_depth;
74 vp.translate[0] = half_width + x;
75 vp.translate[1] = half_height + y;
76 vp.translate[2] = half_depth + z;
77 vp.translate[3] = 0.0f;
79 ctx->set_viewport_state( ctx, &vp );
82 static void set_vertices( void )
84 struct pipe_vertex_element ve[2];
85 struct pipe_vertex_buffer vbuf;
88 memset(ve, 0, sizeof ve);
90 ve[0].src_offset = Offset(struct vertex, position);
91 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
92 ve[1].src_offset = Offset(struct vertex, color);
93 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
95 handle = ctx->create_vertex_elements_state(ctx, 2, ve);
96 ctx->bind_vertex_elements_state(ctx, handle);
99 vbuf.stride = sizeof( struct vertex );
100 vbuf.buffer_offset = 0;
101 vbuf.buffer = screen->user_buffer_create(screen,
104 PIPE_BIND_VERTEX_BUFFER);
106 ctx->set_vertex_buffers(ctx, 1, &vbuf);
109 static void set_vertex_shader( void )
116 "DCL OUT[0], POSITION\n"
117 "DCL OUT[1], GENERIC[0]\n"
118 " 0: MOV OUT[1], IN[1]\n"
119 " 1: MOV OUT[0], IN[0]\n"
122 handle = graw_parse_vertex_shader(ctx, text);
123 ctx->bind_vs_state(ctx, handle);
126 static void set_fragment_shader( void )
131 "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
132 "DCL OUT[0], COLOR\n"
135 " 0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
136 " 1: MOV OUT[0], TEMP[0]\n"
139 handle = graw_parse_fragment_shader(ctx, text);
140 ctx->bind_fs_state(ctx, handle);
144 static void draw( void )
146 float clear_color[4] = {.5,.5,.5,1};
148 ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
149 util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);
150 ctx->flush(ctx, NULL);
152 graw_save_surface_to_file(ctx, surf, NULL);
154 screen->flush_frontbuffer(screen, rttex, 0, 0, window);
159 static void init_tex( void )
161 struct pipe_sampler_view sv_template;
162 struct pipe_sampler_state sampler_desc;
163 struct pipe_resource templat;
165 ubyte tex2d[SIZE][SIZE][4];
169 for (s = 0; s < SIZE; s++) {
170 for (t = 0; t < SIZE; t++) {
173 tex2d[t][s][0] = (x) ? 0 : 63;
174 tex2d[t][s][1] = (x) ? 0 : 128;
176 tex2d[t][s][3] = 0xff;
179 int x = ((s ^ t) >> 2) & 1;
180 tex2d[t][s][0] = s*255/(SIZE-1);
181 tex2d[t][s][1] = t*255/(SIZE-1);
182 tex2d[t][s][2] = (x) ? 0 : 128;
183 tex2d[t][s][3] = 0xff;
189 tex2d[0][0][1] = 255;
190 tex2d[0][0][2] = 255;
195 tex2d[0][1][2] = 255;
196 tex2d[0][1][3] = 255;
198 tex2d[1][0][0] = 255;
199 tex2d[1][0][1] = 255;
201 tex2d[1][0][3] = 255;
203 tex2d[1][1][0] = 255;
206 tex2d[1][1][3] = 255;
209 templat.target = PIPE_TEXTURE_2D;
210 templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
211 templat.width0 = SIZE;
212 templat.height0 = SIZE;
214 templat.array_size = 1;
215 templat.last_level = 0;
216 templat.nr_samples = 1;
217 templat.bind = PIPE_BIND_SAMPLER_VIEW;
220 samptex = screen->resource_create(screen,
225 u_box_2d(0,0,SIZE,SIZE, &box);
227 ctx->transfer_inline_write(ctx,
236 /* Possibly read back & compare against original data:
240 struct pipe_transfer *t;
242 t = pipe_get_transfer(ctx, samptex,
243 0, 0, /* level, layer */
245 0, 0, SIZE, SIZE); /* x, y, width, height */
247 ptr = ctx->transfer_map(ctx, t);
249 if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
254 ctx->transfer_unmap(ctx, t);
256 ctx->transfer_destroy(ctx, t);
259 memset(&sv_template, 0, sizeof sv_template);
260 sv_template.format = samptex->format;
261 sv_template.texture = samptex;
262 sv_template.swizzle_r = 0;
263 sv_template.swizzle_g = 1;
264 sv_template.swizzle_b = 2;
265 sv_template.swizzle_a = 3;
266 sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
270 ctx->set_fragment_sampler_views(ctx, 1, &sv);
273 memset(&sampler_desc, 0, sizeof sampler_desc);
274 sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
275 sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
276 sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
277 sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
278 sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
279 sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
280 sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
281 sampler_desc.compare_func = 0;
282 sampler_desc.normalized_coords = 1;
283 sampler_desc.max_anisotropy = 0;
285 sampler = ctx->create_sampler_state(ctx, &sampler_desc);
289 ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
293 static void init( void )
295 struct pipe_framebuffer_state fb;
296 struct pipe_resource templat;
297 struct pipe_surface surf_tmpl;
300 /* It's hard to say whether window or screen should be created
301 * first. Different environments would prefer one or the other.
303 * Also, no easy way of querying supported formats if the screen
304 * cannot be created first.
306 for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
307 screen = graw_create_window_and_screen(0, 0, 300, 300,
310 if (window && screen)
313 if (!screen || !window) {
314 fprintf(stderr, "Unable to create window\n");
318 ctx = screen->context_create(screen, NULL);
322 templat.target = PIPE_TEXTURE_2D;
323 templat.format = formats[i];
324 templat.width0 = WIDTH;
325 templat.height0 = HEIGHT;
327 templat.array_size = 1;
328 templat.last_level = 0;
329 templat.nr_samples = 1;
330 templat.bind = (PIPE_BIND_RENDER_TARGET |
331 PIPE_BIND_DISPLAY_TARGET);
333 rttex = screen->resource_create(screen,
338 surf_tmpl.format = templat.format;
339 surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
340 surf_tmpl.u.tex.level = 0;
341 surf_tmpl.u.tex.first_layer = 0;
342 surf_tmpl.u.tex.last_layer = 0;
343 surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
347 memset(&fb, 0, sizeof fb);
353 ctx->set_framebuffer_state(ctx, &fb);
356 struct pipe_blend_state blend;
358 memset(&blend, 0, sizeof blend);
359 blend.rt[0].colormask = PIPE_MASK_RGBA;
360 handle = ctx->create_blend_state(ctx, &blend);
361 ctx->bind_blend_state(ctx, handle);
365 struct pipe_depth_stencil_alpha_state depthstencil;
367 memset(&depthstencil, 0, sizeof depthstencil);
368 handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
369 ctx->bind_depth_stencil_alpha_state(ctx, handle);
373 struct pipe_rasterizer_state rasterizer;
375 memset(&rasterizer, 0, sizeof rasterizer);
376 rasterizer.cull_face = PIPE_FACE_NONE;
377 rasterizer.gl_rasterization_rules = 1;
378 handle = ctx->create_rasterizer_state(ctx, &rasterizer);
379 ctx->bind_rasterizer_state(ctx, handle);
382 set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
388 set_fragment_shader();
391 static void args(int argc, char *argv[])
395 for (i = 1; i < argc;) {
396 if (graw_parse_args(&i, argc, argv)) {
403 int main( int argc, char *argv[] )
408 graw_set_display_func( draw );