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
  59 /* softpipe software driver */
  60 #include "softpipe/sp_public.h"
  61
  62 /* null software winsys */
  63 #include "sw/null/null_sw_winsys.h"
  64
  65 /* traceing support see src/gallium/drivers/trace/README for more info. */
  66 #if USE_TRACE
  67 #include "trace/tr_screen.h"
  68 #include "trace/tr_context.h"
  69 #endif
  70
  71 struct program
  72 {
  73         struct pipe_screen *screen;
  74         struct pipe_context *pipe;
  75         struct cso_context *cso;
  76
  77         struct pipe_blend_state blend;
  78         struct pipe_depth_stencil_alpha_state depthstencil;
  79         struct pipe_rasterizer_state rasterizer;
  80         struct pipe_viewport_state viewport;
  81         struct pipe_framebuffer_state framebuffer;
  82         struct pipe_vertex_element velem[2];
  83
  84         void *vs;
  85         void *fs;
  86
  87         float clear_color[4];
  88
  89         struct pipe_buffer *vbuf;
  90         struct pipe_texture *target;
  91 };
  92
  93 static void init_prog(struct program *p)
  94 {
  95         /* create the software rasterizer */
  96         p->screen = softpipe_create_screen(null_sw_create());
  97 #if USE_TRACE
  98         p->screen = trace_screen_create(p->screen);
  99 #endif
 100         p->pipe = p->screen->context_create(p->screen, NULL);
 101         p->cso = cso_create_context(p->pipe);
 102
 103         /* set clear color */
 104         p->clear_color[0] = 0.3;
 105         p->clear_color[1] = 0.1;
 106         p->clear_color[2] = 0.3;
 107         p->clear_color[3] = 1.0;
 108
 109         /* vertex buffer */
 110         {
 111                 float vertices[4][2][4] = {
 112                         {
 113                                 { 0.0f, -0.9f, 0.0f, 1.0f },
 114                                 { 1.0f, 0.0f, 0.0f, 1.0f }
 115                         },
 116                         {
 117                                 { -0.9f, 0.9f, 0.0f, 1.0f },
 118                                 { 0.0f, 1.0f, 0.0f, 1.0f }
 119                         },
 120                         {
 121                                 { 0.9f, 0.9f, 0.0f, 1.0f },
 122                                 { 0.0f, 0.0f, 1.0f, 1.0f }
 123                         }
 124                 };
 125
 126                 p->vbuf = pipe_buffer_create(p->screen, 16, PIPE_BUFFER_USAGE_VERTEX, sizeof(vertices));
 127                 pipe_buffer_write(p->screen, p->vbuf, 0, sizeof(vertices), vertices);
 128         }
 129
 130         /* render target texture */
 131         {
 132                 struct pipe_texture tmplt;
 133                 memset(&tmplt, 0, sizeof(tmplt));
 134                 tmplt.target = PIPE_TEXTURE_2D;
 135                 tmplt.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */
 136                 tmplt.width0 = WIDTH;
 137                 tmplt.height0 = HEIGHT;
 138                 tmplt.depth0 = 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.front_winding = PIPE_WINDING_CW;
 155         p->rasterizer.cull_mode = PIPE_WINDING_NONE;
 156         p->rasterizer.gl_rasterization_rules = 1;
 157
 158         /* drawing destination */
 159         memset(&p->framebuffer, 0, sizeof(p->framebuffer));
 160         p->framebuffer.width = WIDTH;
 161         p->framebuffer.height = HEIGHT;
 162         p->framebuffer.nr_cbufs = 1;
 163         p->framebuffer.cbufs[0] = p->screen->get_tex_surface(p->screen, p->target, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_WRITE);
 164
 165         /* viewport, depth isn't really needed */
 166         {
 167                 float x = 0;
 168                 float y = 0;
 169                 float z = FAR;
 170                 float half_width = (float)WIDTH / 2.0f;
 171                 float half_height = (float)HEIGHT / 2.0f;
 172                 float half_depth = ((float)FAR - (float)NEAR) / 2.0f;
 173                 float scale, bias;
 174
 175                 if (FLIP) {
 176                         scale = -1.0f;
 177                         bias = (float)HEIGHT;
 178                 } else {
 179                         scale = 1.0f;
 180                         bias = 0.0f;
 181                 }
 182
 183                 p->viewport.scale[0] = half_width;
 184                 p->viewport.scale[1] = half_height * scale;
 185                 p->viewport.scale[2] = half_depth;
 186                 p->viewport.scale[3] = 1.0f;
 187
 188                 p->viewport.translate[0] = half_width + x;
 189                 p->viewport.translate[1] = (half_height + y) * scale + bias;
 190                 p->viewport.translate[2] = half_depth + z;
 191                 p->viewport.translate[3] = 0.0f;
 192         }
 193
 194         /* vertex elements state */
 195         memset(p->velem, 0, sizeof(p->velem));
 196         p->velem[0].src_offset = 0 * 4 * sizeof(float); /* offset 0, first element */
 197         p->velem[0].instance_divisor = 0;
 198         p->velem[0].vertex_buffer_index = 0;
 199         p->velem[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 200
 201         p->velem[1].src_offset = 1 * 4 * sizeof(float); /* offset 16, second element */
 202         p->velem[1].instance_divisor = 0;
 203         p->velem[1].vertex_buffer_index = 0;
 204         p->velem[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 205
 206         /* vertex shader */
 207         {
 208                         const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 209                                                         TGSI_SEMANTIC_COLOR };
 210                         const uint semantic_indexes[] = { 0, 0 };
 211                         p->vs = util_make_vertex_passthrough_shader(p->pipe, 2, semantic_names, semantic_indexes);
 212         }
 213
 214         /* fragment shader */
 215         p->fs = util_make_fragment_passthrough_shader(p->pipe);
 216 }
 217
 218 static void close_prog(struct program *p)
 219 {
 220         /* unset all state */
 221         cso_release_all(p->cso);
 222
 223         p->pipe->delete_vs_state(p->pipe, p->vs);
 224         p->pipe->delete_fs_state(p->pipe, p->fs);
 225
 226         pipe_surface_reference(&p->framebuffer.cbufs[0], NULL);
 227         pipe_texture_reference(&p->target, NULL);
 228         pipe_buffer_reference(&p->vbuf, NULL);
 229
 230         cso_destroy_context(p->cso);
 231         p->pipe->destroy(p->pipe);
 232         p->screen->destroy(p->screen);
 233
 234         FREE(p);
 235 }
 236
 237 static void draw(struct program *p)
 238 {
 239         /* set the render target */
 240         cso_set_framebuffer(p->cso, &p->framebuffer);
 241
 242         /* clear the render target */
 243         p->pipe->clear(p->pipe, PIPE_CLEAR_COLOR, p->clear_color, 0, 0);
 244
 245         /* set misc state we care about */
 246         cso_set_blend(p->cso, &p->blend);
 247         cso_set_depth_stencil_alpha(p->cso, &p->depthstencil);
 248         cso_set_rasterizer(p->cso, &p->rasterizer);
 249         cso_set_viewport(p->cso, &p->viewport);
 250
 251         /* shaders */
 252         cso_set_fragment_shader_handle(p->cso, p->fs);
 253         cso_set_vertex_shader_handle(p->cso, p->vs);
 254
 255         /* vertex element data */
 256         cso_set_vertex_elements(p->cso, 2, p->velem);
 257
 258         util_draw_vertex_buffer(p->pipe,
 259                                 p->vbuf, 0,
 260                                 PIPE_PRIM_TRIANGLES,
 261                                 3,  /* verts */
 262                                 2); /* attribs/vert */
 263
 264         p->pipe->flush(p->pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 265
 266         debug_dump_surface_bmp(p->pipe, "result.bmp", p->framebuffer.cbufs[0]);
 267 }
 268
 269 int main(int argc, char** argv)
 270 {
 271         struct program *p = CALLOC_STRUCT(program);
 272
 273         init_prog(p);
 274         draw(p);
 275         close_prog(p);
 276
 277         return 0;
 278 }