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