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      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 /* u_sampler_view_default_template */
     51 #include "util/u_sampler.h"
     52 /* debug_dump_surface_bmp */
     53 #include "util/u_debug.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 
     63 struct 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 
     89 static 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, PIPE_SEARCH_DIR);
    100 	assert(p->screen);
    101 
    102 	/* create the pipe driver context and cso context */
    103 	p->pipe = p->screen->context_create(p->screen, NULL);
    104 	p->cso = cso_create_context(p->pipe);
    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_STATIC, 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 
    178 		t = p->pipe->get_transfer(p->pipe, p->tex, 0, PIPE_TRANSFER_WRITE, &box);
    179 
    180 		ptr = p->pipe->transfer_map(p->pipe, t);
    181 		ptr[0] = 0xffff0000;
    182 		ptr[1] = 0xff0000ff;
    183 		ptr[2] = 0xff00ff00;
    184 		ptr[3] = 0xffffff00;
    185 		p->pipe->transfer_unmap(p->pipe, t);
    186 
    187 		p->pipe->transfer_destroy(p->pipe, t);
    188 
    189 		u_sampler_view_default_template(&v_tmplt, p->tex, p->tex->format);
    190 
    191 		p->view = p->pipe->create_sampler_view(p->pipe, p->tex, &v_tmplt);
    192 	}
    193 
    194 	/* disabled blending/masking */
    195 	memset(&p->blend, 0, sizeof(p->blend));
    196 	p->blend.rt[0].colormask = PIPE_MASK_RGBA;
    197 
    198 	/* no-op depth/stencil/alpha */
    199 	memset(&p->depthstencil, 0, sizeof(p->depthstencil));
    200 
    201 	/* rasterizer */
    202 	memset(&p->rasterizer, 0, sizeof(p->rasterizer));
    203 	p->rasterizer.cull_face = PIPE_FACE_NONE;
    204 	p->rasterizer.gl_rasterization_rules = 1;
    205 	p->rasterizer.depth_clip = 1;
    206 
    207 	/* sampler */
    208 	memset(&p->sampler, 0, sizeof(p->sampler));
    209 	p->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
    210 	p->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
    211 	p->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
    212 	p->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
    213 	p->sampler.min_img_filter = PIPE_TEX_MIPFILTER_LINEAR;
    214 	p->sampler.mag_img_filter = PIPE_TEX_MIPFILTER_LINEAR;
    215 	p->sampler.normalized_coords = 1;
    216 
    217 	surf_tmpl.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */
    218 	surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
    219 	surf_tmpl.u.tex.level = 0;
    220 	surf_tmpl.u.tex.first_layer = 0;
    221 	surf_tmpl.u.tex.last_layer = 0;
    222 	/* drawing destination */
    223 	memset(&p->framebuffer, 0, sizeof(p->framebuffer));
    224 	p->framebuffer.width = WIDTH;
    225 	p->framebuffer.height = HEIGHT;
    226 	p->framebuffer.nr_cbufs = 1;
    227 	p->framebuffer.cbufs[0] = p->pipe->create_surface(p->pipe, p->target, &surf_tmpl);
    228 
    229 	/* viewport, depth isn't really needed */
    230 	{
    231 		float x = 0;
    232 		float y = 0;
    233 		float z = FAR;
    234 		float half_width = (float)WIDTH / 2.0f;
    235 		float half_height = (float)HEIGHT / 2.0f;
    236 		float half_depth = ((float)FAR - (float)NEAR) / 2.0f;
    237 		float scale, bias;
    238 
    239 		if (FLIP) {
    240 			scale = -1.0f;
    241 			bias = (float)HEIGHT;
    242 		} else {
    243 			scale = 1.0f;
    244 			bias = 0.0f;
    245 		}
    246 
    247 		p->viewport.scale[0] = half_width;
    248 		p->viewport.scale[1] = half_height * scale;
    249 		p->viewport.scale[2] = half_depth;
    250 		p->viewport.scale[3] = 1.0f;
    251 
    252 		p->viewport.translate[0] = half_width + x;
    253 		p->viewport.translate[1] = (half_height + y) * scale + bias;
    254 		p->viewport.translate[2] = half_depth + z;
    255 		p->viewport.translate[3] = 0.0f;
    256 	}
    257 
    258 	/* vertex elements state */
    259 	memset(p->velem, 0, sizeof(p->velem));
    260 	p->velem[0].src_offset = 0 * 4 * sizeof(float); /* offset 0, first element */
    261 	p->velem[0].instance_divisor = 0;
    262 	p->velem[0].vertex_buffer_index = 0;
    263 	p->velem[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
    264 
    265 	p->velem[1].src_offset = 1 * 4 * sizeof(float); /* offset 16, second element */
    266 	p->velem[1].instance_divisor = 0;
    267 	p->velem[1].vertex_buffer_index = 0;
    268 	p->velem[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
    269 
    270 	/* vertex shader */
    271 	{
    272 		const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
    273 		                                TGSI_SEMANTIC_GENERIC };
    274 		const uint semantic_indexes[] = { 0, 0 };
    275 		p->vs = util_make_vertex_passthrough_shader(p->pipe, 2, semantic_names, semantic_indexes);
    276 	}
    277 
    278 	/* fragment shader */
    279 	p->fs = util_make_fragment_tex_shader(p->pipe, TGSI_TEXTURE_2D, TGSI_INTERPOLATE_LINEAR);
    280 }
    281 
    282 static void close_prog(struct program *p)
    283 {
    284 	/* unset bound textures as well */
    285 	cso_set_sampler_views(p->cso, PIPE_SHADER_FRAGMENT, 0, NULL);
    286 
    287 	/* unset all state */
    288 	cso_release_all(p->cso);
    289 
    290 	p->pipe->delete_vs_state(p->pipe, p->vs);
    291 	p->pipe->delete_fs_state(p->pipe, p->fs);
    292 
    293 	pipe_surface_reference(&p->framebuffer.cbufs[0], NULL);
    294 	pipe_sampler_view_reference(&p->view, NULL);
    295 	pipe_resource_reference(&p->target, NULL);
    296 	pipe_resource_reference(&p->tex, NULL);
    297 	pipe_resource_reference(&p->vbuf, NULL);
    298 
    299 	cso_destroy_context(p->cso);
    300 	p->pipe->destroy(p->pipe);
    301 	p->screen->destroy(p->screen);
    302 	pipe_loader_release(&p->dev, 1);
    303 
    304 	FREE(p);
    305 }
    306 
    307 static void draw(struct program *p)
    308 {
    309 	/* set the render target */
    310 	cso_set_framebuffer(p->cso, &p->framebuffer);
    311 
    312 	/* clear the render target */
    313 	p->pipe->clear(p->pipe, PIPE_CLEAR_COLOR, &p->clear_color, 0, 0);
    314 
    315 	/* set misc state we care about */
    316 	cso_set_blend(p->cso, &p->blend);
    317 	cso_set_depth_stencil_alpha(p->cso, &p->depthstencil);
    318 	cso_set_rasterizer(p->cso, &p->rasterizer);
    319 	cso_set_viewport(p->cso, &p->viewport);
    320 
    321 	/* sampler */
    322 	cso_single_sampler(p->cso, 0, &p->sampler);
    323 	cso_single_sampler_done(p->cso);
    324 
    325 	/* texture sampler view */
    326 	cso_set_sampler_views(p->cso, PIPE_SHADER_FRAGMENT, 1, &p->view);
    327 
    328 	/* shaders */
    329 	cso_set_fragment_shader_handle(p->cso, p->fs);
    330 	cso_set_vertex_shader_handle(p->cso, p->vs);
    331 
    332 	/* vertex element data */
    333 	cso_set_vertex_elements(p->cso, 2, p->velem);
    334 
    335 	util_draw_vertex_buffer(p->pipe, p->cso,
    336 	                        p->vbuf, 0,
    337 	                        PIPE_PRIM_QUADS,
    338 	                        4,  /* verts */
    339 	                        2); /* attribs/vert */
    340 
    341         p->pipe->flush(p->pipe, NULL);
    342 
    343 	debug_dump_surface_bmp(p->pipe, "result.bmp", p->framebuffer.cbufs[0]);
    344 }
    345 
    346 int main(int argc, char** argv)
    347 {
    348 	struct program *p = CALLOC_STRUCT(program);
    349 
    350 	init_prog(p);
    351 	draw(p);
    352 	close_prog(p);
    353 
    354 	return 0;
    355 }
    356