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1 /* Display a cleared blue window.  This demo has no dependencies on
2  * any utility code, just the graw interface and gallium.
3  */
4 
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"
11 
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"
17 
18 #include <stdio.h>
19 
20 enum pipe_format formats[] = {
21    PIPE_FORMAT_R8G8B8A8_UNORM,
22    PIPE_FORMAT_B8G8R8A8_UNORM,
23    PIPE_FORMAT_NONE
24 };
25 
26 static const int WIDTH = 300;
27 static const int HEIGHT = 300;
28 
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;
37 
38 struct vertex {
39    float position[4];
40    float color[4];
41 };
42 
43 static struct vertex vertices[] =
44 {
45    { { 0.9, -0.9, 0.0, 1.0 },
46      { 1, 0, 0, 1 } },
47 
48    { { 0.9,  0.9, 0.0, 1.0 },
49      { 1, 1, 0, 1 } },
50 
51    { {-0.9,  0.9, 0.0, 1.0 },
52      { 0, 1, 0, 1 } },
53 
54    { {-0.9,  -0.9, 0.0, 1.0 },
55      { 0, 0, 0, 1 } },
56 };
57 
58 
59 
60 
set_viewport(float x,float y,float width,float height,float near,float far)61 static void set_viewport( float x, float y,
62                           float width, float height,
63                           float near, float far)
64 {
65    float z = 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;
70 
71    vp.scale[0] = half_width;
72    vp.scale[1] = half_height;
73    vp.scale[2] = half_depth;
74    vp.scale[3] = 1.0f;
75 
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;
80 
81    ctx->set_viewport_state( ctx, &vp );
82 }
83 
set_vertices(void)84 static void set_vertices( void )
85 {
86    struct pipe_vertex_element ve[2];
87    struct pipe_vertex_buffer vbuf;
88    void *handle;
89 
90    memset(ve, 0, sizeof ve);
91 
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;
96 
97    handle = ctx->create_vertex_elements_state(ctx, 2, ve);
98    ctx->bind_vertex_elements_state(ctx, handle);
99 
100 
101    vbuf.stride = sizeof( struct vertex );
102    vbuf.buffer_offset = 0;
103    vbuf.buffer = pipe_buffer_create_with_data(ctx,
104                                               PIPE_BIND_VERTEX_BUFFER,
105                                               PIPE_USAGE_STATIC,
106                                               sizeof(vertices),
107                                               vertices);
108 
109    ctx->set_vertex_buffers(ctx, 1, &vbuf);
110 }
111 
set_vertex_shader(void)112 static void set_vertex_shader( void )
113 {
114    void *handle;
115    const char *text =
116       "VERT\n"
117       "DCL IN[0]\n"
118       "DCL IN[1]\n"
119       "DCL OUT[0], POSITION\n"
120       "DCL OUT[1], GENERIC[0]\n"
121       "  0: MOV OUT[1], IN[1]\n"
122       "  1: MOV OUT[0], IN[0]\n"
123       "  2: END\n";
124 
125    handle = graw_parse_vertex_shader(ctx, text);
126    ctx->bind_vs_state(ctx, handle);
127 }
128 
set_fragment_shader(void)129 static void set_fragment_shader( void )
130 {
131    void *handle;
132    const char *text =
133       "FRAG\n"
134       "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
135       "DCL OUT[0], COLOR\n"
136       "DCL TEMP[0]\n"
137       "DCL SAMP[0]\n"
138       "DCL RES[0], 2D, FLOAT\n"
139       "  0: SAMPLE TEMP[0], IN[0], RES[0], SAMP[0]\n"
140       "  1: MOV OUT[0], TEMP[0]\n"
141       "  2: END\n";
142 
143    handle = graw_parse_fragment_shader(ctx, text);
144    ctx->bind_fs_state(ctx, handle);
145 }
146 
147 
draw(void)148 static void draw( void )
149 {
150    union pipe_color_union clear_color = { {.5,.5,.5,1} };
151 
152    ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
153    util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);
154    ctx->flush(ctx, NULL);
155 
156    graw_save_surface_to_file(ctx, surf, NULL);
157 
158    screen->flush_frontbuffer(screen, rttex, 0, 0, window);
159 }
160 
161 #define SIZE 16
162 
init_tex(void)163 static void init_tex( void )
164 {
165    struct pipe_sampler_view sv_template;
166    struct pipe_sampler_state sampler_desc;
167    struct pipe_resource templat;
168    struct pipe_box box;
169    ubyte tex2d[SIZE][SIZE][4];
170    int s, t;
171 
172 #if (SIZE != 2)
173    for (s = 0; s < SIZE; s++) {
174       for (t = 0; t < SIZE; t++) {
175          if (0) {
176             int x = (s ^ t) & 1;
177 	    tex2d[t][s][0] = (x) ? 0 : 63;
178 	    tex2d[t][s][1] = (x) ? 0 : 128;
179 	    tex2d[t][s][2] = 0;
180 	    tex2d[t][s][3] = 0xff;
181          }
182          else {
183             int x = ((s ^ t) >> 2) & 1;
184 	    tex2d[t][s][0] = s*255/(SIZE-1);
185 	    tex2d[t][s][1] = t*255/(SIZE-1);
186 	    tex2d[t][s][2] = (x) ? 0 : 128;
187 	    tex2d[t][s][3] = 0xff;
188          }
189       }
190    }
191 #else
192    tex2d[0][0][0] = 0;
193    tex2d[0][0][1] = 255;
194    tex2d[0][0][2] = 255;
195    tex2d[0][0][3] = 0;
196 
197    tex2d[0][1][0] = 0;
198    tex2d[0][1][1] = 0;
199    tex2d[0][1][2] = 255;
200    tex2d[0][1][3] = 255;
201 
202    tex2d[1][0][0] = 255;
203    tex2d[1][0][1] = 255;
204    tex2d[1][0][2] = 0;
205    tex2d[1][0][3] = 255;
206 
207    tex2d[1][1][0] = 255;
208    tex2d[1][1][1] = 0;
209    tex2d[1][1][2] = 0;
210    tex2d[1][1][3] = 255;
211 #endif
212 
213    templat.target = PIPE_TEXTURE_2D;
214    templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
215    templat.width0 = SIZE;
216    templat.height0 = SIZE;
217    templat.depth0 = 1;
218    templat.last_level = 0;
219    templat.nr_samples = 1;
220    templat.bind = PIPE_BIND_SAMPLER_VIEW;
221 
222 
223    samptex = screen->resource_create(screen,
224                                  &templat);
225    if (samptex == NULL)
226       exit(4);
227 
228    u_box_2d(0,0,SIZE,SIZE, &box);
229 
230    ctx->transfer_inline_write(ctx,
231                               samptex,
232                               0,
233                               PIPE_TRANSFER_WRITE,
234                               &box,
235                               tex2d,
236                               sizeof tex2d[0],
237                               sizeof tex2d);
238 
239    /* Possibly read back & compare against original data:
240     */
241    if (0)
242    {
243       struct pipe_transfer *t;
244       uint32_t *ptr;
245       t = pipe_get_transfer(ctx, samptex,
246                             0, 0, /* level, layer */
247                             PIPE_TRANSFER_READ,
248                             0, 0, SIZE, SIZE); /* x, y, width, height */
249 
250       ptr = ctx->transfer_map(ctx, t);
251 
252       if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
253          assert(0);
254          exit(9);
255       }
256 
257       ctx->transfer_unmap(ctx, t);
258 
259       ctx->transfer_destroy(ctx, t);
260    }
261 
262    memset(&sv_template, 0, sizeof sv_template);
263    sv_template.format = samptex->format;
264    sv_template.texture = samptex;
265    sv_template.swizzle_r = 0;
266    sv_template.swizzle_g = 1;
267    sv_template.swizzle_b = 2;
268    sv_template.swizzle_a = 3;
269    sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
270    if (sv == NULL)
271       exit(5);
272 
273    ctx->set_fragment_sampler_views(ctx, 1, &sv);
274 
275 
276    memset(&sampler_desc, 0, sizeof sampler_desc);
277    sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
278    sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
279    sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
280    sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
281    sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
282    sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
283    sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
284    sampler_desc.compare_func = 0;
285    sampler_desc.normalized_coords = 1;
286    sampler_desc.max_anisotropy = 0;
287 
288    sampler = ctx->create_sampler_state(ctx, &sampler_desc);
289    if (sampler == NULL)
290       exit(6);
291 
292    ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
293 
294 }
295 
init(void)296 static void init( void )
297 {
298    struct pipe_framebuffer_state fb;
299    struct pipe_resource templat;
300    struct pipe_surface surf_tmpl;
301    int i;
302 
303    /* It's hard to say whether window or screen should be created
304     * first.  Different environments would prefer one or the other.
305     *
306     * Also, no easy way of querying supported formats if the screen
307     * cannot be created first.
308     */
309    for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
310       screen = graw_create_window_and_screen(0, 0, 300, 300,
311                                              formats[i],
312                                              &window);
313       if (window && screen)
314          break;
315    }
316    if (!screen || !window) {
317       fprintf(stderr, "Unable to create window\n");
318       exit(1);
319    }
320 
321    ctx = screen->context_create(screen, NULL);
322    if (ctx == NULL)
323       exit(3);
324 
325    templat.target = PIPE_TEXTURE_2D;
326    templat.format = formats[i];
327    templat.width0 = WIDTH;
328    templat.height0 = HEIGHT;
329    templat.depth0 = 1;
330    templat.array_size = 1;
331    templat.last_level = 0;
332    templat.nr_samples = 1;
333    templat.bind = (PIPE_BIND_RENDER_TARGET |
334                    PIPE_BIND_DISPLAY_TARGET);
335 
336    rttex = screen->resource_create(screen,
337                                  &templat);
338    if (rttex == NULL)
339       exit(4);
340 
341    surf_tmpl.format = templat.format;
342    surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
343    surf_tmpl.u.tex.level = 0;
344    surf_tmpl.u.tex.first_layer = 0;
345    surf_tmpl.u.tex.last_layer = 0;
346    surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
347    if (surf == NULL)
348       exit(5);
349 
350    memset(&fb, 0, sizeof fb);
351    fb.nr_cbufs = 1;
352    fb.width = WIDTH;
353    fb.height = HEIGHT;
354    fb.cbufs[0] = surf;
355 
356    ctx->set_framebuffer_state(ctx, &fb);
357 
358    {
359       struct pipe_blend_state blend;
360       void *handle;
361       memset(&blend, 0, sizeof blend);
362       blend.rt[0].colormask = PIPE_MASK_RGBA;
363       handle = ctx->create_blend_state(ctx, &blend);
364       ctx->bind_blend_state(ctx, handle);
365    }
366 
367    {
368       struct pipe_depth_stencil_alpha_state depthstencil;
369       void *handle;
370       memset(&depthstencil, 0, sizeof depthstencil);
371       handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
372       ctx->bind_depth_stencil_alpha_state(ctx, handle);
373    }
374 
375    {
376       struct pipe_rasterizer_state rasterizer;
377       void *handle;
378       memset(&rasterizer, 0, sizeof rasterizer);
379       rasterizer.cull_face = PIPE_FACE_NONE;
380       rasterizer.gl_rasterization_rules = 1;
381       rasterizer.depth_clip = 1;
382       handle = ctx->create_rasterizer_state(ctx, &rasterizer);
383       ctx->bind_rasterizer_state(ctx, handle);
384    }
385 
386    set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
387 
388    init_tex();
389 
390    set_vertices();
391    set_vertex_shader();
392    set_fragment_shader();
393 }
394 
args(int argc,char * argv[])395 static void args(int argc, char *argv[])
396 {
397    int i;
398 
399    for (i = 1; i < argc;) {
400       if (graw_parse_args(&i, argc, argv)) {
401          continue;
402       }
403       exit(1);
404    }
405 }
406 
407 
main(int argc,char * argv[])408 int main( int argc, char *argv[] )
409 {
410    args(argc, argv);
411    init();
412 
413    graw_set_display_func( draw );
414    graw_main_loop();
415    return 0;
416 }
417