src/gallium/tests/trivial/tri.c

   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 /* debug_dump_surface_bmp */
  51 #include "util/u_debug.h"
  52 /* util_draw_vertex_buffer helper */
  53 #include "util/u_draw_quad.h"
  54 /* FREE & CALLOC_STRUCT */
  55 #include "util/u_memory.h"
  56 /* util_make_[fragment|vertex]_passthrough_shader */
  57 #include "util/u_simple_shaders.h"
  58 /* to get a hardware pipe driver */
  59 #include "pipe-loader/pipe_loader.h"
  60
  61 struct program
  62 {
  63         struct pipe_loader_device *dev;
  64         struct pipe_screen *screen;
  65         struct pipe_context *pipe;
  66         struct cso_context *cso;
  67
  68         struct pipe_blend_state blend;
  69         struct pipe_depth_stencil_alpha_state depthstencil;
  70         struct pipe_rasterizer_state rasterizer;
  71         struct pipe_viewport_state viewport;
  72         struct pipe_framebuffer_state framebuffer;
  73         struct pipe_vertex_element velem[2];
  74
  75         void *vs;
  76         void *fs;
  77
  78         union pipe_color_union clear_color;
  79
  80         struct pipe_resource *vbuf;
  81         struct pipe_resource *target;
  82 };
  83
  84 static void init_prog(struct program *p)
  85 {
  86         struct pipe_surface surf_tmpl;
  87         int ret;
  88
  89         /* find a hardware device */
  90         ret = pipe_loader_probe(&p->dev, 1);
  91         assert(ret);
  92
  93         /* init a pipe screen */
  94         p->screen = pipe_loader_create_screen(p->dev, PIPE_SEARCH_DIR);
  95         assert(p->screen);
  96
  97         /* create the pipe driver context and cso context */
  98         p->pipe = p->screen->context_create(p->screen, NULL);
  99         p->cso = cso_create_context(p->pipe);
 100
 101         /* set clear color */
 102         p->clear_color.f[0] = 0.3;
 103         p->clear_color.f[1] = 0.1;
 104         p->clear_color.f[2] = 0.3;
 105         p->clear_color.f[3] = 1.0;
 106
 107         /* vertex buffer */
 108         {
 109                 float vertices[4][2][4] = {
 110                         {
 111                                 { 0.0f, -0.9f, 0.0f, 1.0f },
 112                                 { 1.0f, 0.0f, 0.0f, 1.0f }
 113                         },
 114                         {
 115                                 { -0.9f, 0.9f, 0.0f, 1.0f },
 116                                 { 0.0f, 1.0f, 0.0f, 1.0f }
 117                         },
 118                         {
 119                                 { 0.9f, 0.9f, 0.0f, 1.0f },
 120                                 { 0.0f, 0.0f, 1.0f, 1.0f }
 121                         }
 122                 };
 123
 124                 p->vbuf = pipe_buffer_create(p->screen, PIPE_BIND_VERTEX_BUFFER,
 125                                              PIPE_USAGE_DEFAULT, sizeof(vertices));
 126                 pipe_buffer_write(p->pipe, p->vbuf, 0, sizeof(vertices), vertices);
 127         }
 128
 129         /* render target texture */
 130         {
 131                 struct pipe_resource tmplt;
 132                 memset(&tmplt, 0, sizeof(tmplt));
 133                 tmplt.target = PIPE_TEXTURE_2D;
 134                 tmplt.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */
 135                 tmplt.width0 = WIDTH;
 136                 tmplt.height0 = HEIGHT;
 137                 tmplt.depth0 = 1;
 138                 tmplt.array_size = 1;
 139                 tmplt.last_level = 0;
 140                 tmplt.bind = PIPE_BIND_RENDER_TARGET;
 141
 142                 p->target = p->screen->resource_create(p->screen, &tmplt);
 143         }
 144
 145         /* disabled blending/masking */
 146         memset(&p->blend, 0, sizeof(p->blend));
 147         p->blend.rt[0].colormask = PIPE_MASK_RGBA;
 148
 149         /* no-op depth/stencil/alpha */
 150         memset(&p->depthstencil, 0, sizeof(p->depthstencil));
 151
 152         /* rasterizer */
 153         memset(&p->rasterizer, 0, sizeof(p->rasterizer));
 154         p->rasterizer.cull_face = PIPE_FACE_NONE;
 155         p->rasterizer.half_pixel_center = 1;
 156         p->rasterizer.bottom_edge_rule = 1;
 157         p->rasterizer.depth_clip = 1;
 158
 159         surf_tmpl.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 160         surf_tmpl.u.tex.level = 0;
 161         surf_tmpl.u.tex.first_layer = 0;
 162         surf_tmpl.u.tex.last_layer = 0;
 163         /* drawing destination */
 164         memset(&p->framebuffer, 0, sizeof(p->framebuffer));
 165         p->framebuffer.width = WIDTH;
 166         p->framebuffer.height = HEIGHT;
 167         p->framebuffer.nr_cbufs = 1;
 168         p->framebuffer.cbufs[0] = p->pipe->create_surface(p->pipe, p->target, &surf_tmpl);
 169
 170         /* viewport, depth isn't really needed */
 171         {
 172                 float x = 0;
 173                 float y = 0;
 174                 float z = FAR;
 175                 float half_width = (float)WIDTH / 2.0f;
 176                 float half_height = (float)HEIGHT / 2.0f;
 177                 float half_depth = ((float)FAR - (float)NEAR) / 2.0f;
 178                 float scale, bias;
 179
 180                 if (FLIP) {
 181                         scale = -1.0f;
 182                         bias = (float)HEIGHT;
 183                 } else {
 184                         scale = 1.0f;
 185                         bias = 0.0f;
 186                 }
 187
 188                 p->viewport.scale[0] = half_width;
 189                 p->viewport.scale[1] = half_height * scale;
 190                 p->viewport.scale[2] = half_depth;
 191
 192                 p->viewport.translate[0] = half_width + x;
 193                 p->viewport.translate[1] = (half_height + y) * scale + bias;
 194                 p->viewport.translate[2] = half_depth + z;
 195         }
 196
 197         /* vertex elements state */
 198         memset(p->velem, 0, sizeof(p->velem));
 199         p->velem[0].src_offset = 0 * 4 * sizeof(float); /* offset 0, first element */
 200         p->velem[0].instance_divisor = 0;
 201         p->velem[0].vertex_buffer_index = 0;
 202         p->velem[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 203
 204         p->velem[1].src_offset = 1 * 4 * sizeof(float); /* offset 16, second element */
 205         p->velem[1].instance_divisor = 0;
 206         p->velem[1].vertex_buffer_index = 0;
 207         p->velem[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 208
 209         /* vertex shader */
 210         {
 211                         const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 212                                                         TGSI_SEMANTIC_COLOR };
 213                         const uint semantic_indexes[] = { 0, 0 };
 214                         p->vs = util_make_vertex_passthrough_shader(p->pipe, 2, semantic_names, semantic_indexes, FALSE);
 215         }
 216
 217         /* fragment shader */
 218         p->fs = util_make_fragment_passthrough_shader(p->pipe,
 219                     TGSI_SEMANTIC_COLOR, TGSI_INTERPOLATE_PERSPECTIVE, TRUE);
 220 }
 221
 222 static void close_prog(struct program *p)
 223 {
 224         cso_destroy_context(p->cso);
 225
 226         p->pipe->delete_vs_state(p->pipe, p->vs);
 227         p->pipe->delete_fs_state(p->pipe, p->fs);
 228
 229         pipe_surface_reference(&p->framebuffer.cbufs[0], NULL);
 230         pipe_resource_reference(&p->target, NULL);
 231         pipe_resource_reference(&p->vbuf, NULL);
 232
 233         p->pipe->destroy(p->pipe);
 234         p->screen->destroy(p->screen);
 235         pipe_loader_release(&p->dev, 1);
 236
 237         FREE(p);
 238 }
 239
 240 static void draw(struct program *p)
 241 {
 242         /* set the render target */
 243         cso_set_framebuffer(p->cso, &p->framebuffer);
 244
 245         /* clear the render target */
 246         p->pipe->clear(p->pipe, PIPE_CLEAR_COLOR, &p->clear_color, 0, 0);
 247
 248         /* set misc state we care about */
 249         cso_set_blend(p->cso, &p->blend);
 250         cso_set_depth_stencil_alpha(p->cso, &p->depthstencil);
 251         cso_set_rasterizer(p->cso, &p->rasterizer);
 252         cso_set_viewport(p->cso, &p->viewport);
 253
 254         /* shaders */
 255         cso_set_fragment_shader_handle(p->cso, p->fs);
 256         cso_set_vertex_shader_handle(p->cso, p->vs);
 257
 258         /* vertex element data */
 259         cso_set_vertex_elements(p->cso, 2, p->velem);
 260
 261         util_draw_vertex_buffer(p->pipe, p->cso,
 262                                 p->vbuf, 0, 0,
 263                                 PIPE_PRIM_TRIANGLES,
 264                                 3,  /* verts */
 265                                 2); /* attribs/vert */
 266
 267         p->pipe->flush(p->pipe, NULL, 0);
 268
 269         debug_dump_surface_bmp(p->pipe, "result.bmp", p->framebuffer.cbufs[0]);
 270 }
 271
 272 int main(int argc, char** argv)
 273 {
 274         struct program *p = CALLOC_STRUCT(program);
 275
 276         init_prog(p);
 277         draw(p);
 278         close_prog(p);
 279
 280         return 0;
 281 }