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/************************************************************************** |
* |
* Copyright © 2010 Jakob Bornecrantz |
* |
* Permission is hereby granted, free of charge, to any person obtaining a |
* copy of this software and associated documentation files (the "Software"), |
* to deal in the Software without restriction, including without limitation |
* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
* and/or sell copies of the Software, and to permit persons to whom the |
* Software is furnished to do so, subject to the following conditions: |
* |
* The above copyright notice and this permission notice (including the next |
* paragraph) shall be included in all copies or substantial portions of the |
* Software. |
* |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
* DEALINGS IN THE SOFTWARE. |
* |
**************************************************************************/ |
|
|
#define USE_TRACE 0 |
#define WIDTH 300 |
#define HEIGHT 300 |
#define NEAR 30 |
#define FAR 1000 |
#define FLIP 0 |
|
/* pipe_*_state structs */ |
#include "pipe/p_state.h" |
/* pipe_context */ |
#include "pipe/p_context.h" |
/* pipe_screen */ |
#include "pipe/p_screen.h" |
/* PIPE_* */ |
#include "pipe/p_defines.h" |
/* TGSI_SEMANTIC_{POSITION|GENERIC} */ |
#include "pipe/p_shader_tokens.h" |
/* pipe_buffer_* helpers */ |
#include "util/u_inlines.h" |
|
/* constant state object helper */ |
#include "cso_cache/cso_context.h" |
|
/* u_sampler_view_default_template */ |
#include "util/u_sampler.h" |
/* debug_dump_surface_bmp */ |
#include "util/u_debug.h" |
/* util_draw_vertex_buffer helper */ |
#include "util/u_draw_quad.h" |
/* FREE & CALLOC_STRUCT */ |
#include "util/u_memory.h" |
/* util_make_[fragment|vertex]_passthrough_shader */ |
#include "util/u_simple_shaders.h" |
/* to get a hardware pipe driver */ |
#include "pipe-loader/pipe_loader.h" |
|
struct program |
{ |
struct pipe_loader_device *dev; |
struct pipe_screen *screen; |
struct pipe_context *pipe; |
struct cso_context *cso; |
|
struct pipe_blend_state blend; |
struct pipe_depth_stencil_alpha_state depthstencil; |
struct pipe_rasterizer_state rasterizer; |
struct pipe_sampler_state sampler; |
struct pipe_viewport_state viewport; |
struct pipe_framebuffer_state framebuffer; |
struct pipe_vertex_element velem[2]; |
|
void *vs; |
void *fs; |
|
union pipe_color_union clear_color; |
|
struct pipe_resource *vbuf; |
struct pipe_resource *target; |
struct pipe_resource *tex; |
struct pipe_sampler_view *view; |
}; |
|
static void init_prog(struct program *p) |
{ |
struct pipe_surface surf_tmpl; |
int ret; |
|
/* find a hardware device */ |
ret = pipe_loader_probe(&p->dev, 1); |
assert(ret); |
|
/* init a pipe screen */ |
p->screen = pipe_loader_create_screen(p->dev, PIPE_SEARCH_DIR); |
assert(p->screen); |
|
/* create the pipe driver context and cso context */ |
p->pipe = p->screen->context_create(p->screen, NULL); |
p->cso = cso_create_context(p->pipe); |
|
/* set clear color */ |
p->clear_color.f[0] = 0.3; |
p->clear_color.f[1] = 0.1; |
p->clear_color.f[2] = 0.3; |
p->clear_color.f[3] = 1.0; |
|
/* vertex buffer */ |
{ |
float vertices[4][2][4] = { |
{ |
{ 0.9f, 0.9f, 0.0f, 1.0f }, |
{ 1.0f, 1.0f, 0.0f, 1.0f } |
}, |
{ |
{ -0.9f, 0.9f, 0.0f, 1.0f }, |
{ 0.0f, 1.0f, 0.0f, 1.0f } |
}, |
{ |
{ -0.9f, -0.9f, 0.0f, 1.0f }, |
{ 0.0f, 0.0f, 1.0f, 1.0f } |
}, |
{ |
{ 0.9f, -0.9f, 0.0f, 1.0f }, |
{ 1.0f, 0.0f, 1.0f, 1.0f } |
} |
}; |
|
p->vbuf = pipe_buffer_create(p->screen, PIPE_BIND_VERTEX_BUFFER, |
PIPE_USAGE_DEFAULT, sizeof(vertices)); |
pipe_buffer_write(p->pipe, p->vbuf, 0, sizeof(vertices), vertices); |
} |
|
/* render target texture */ |
{ |
struct pipe_resource tmplt; |
memset(&tmplt, 0, sizeof(tmplt)); |
tmplt.target = PIPE_TEXTURE_2D; |
tmplt.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */ |
tmplt.width0 = WIDTH; |
tmplt.height0 = HEIGHT; |
tmplt.depth0 = 1; |
tmplt.array_size = 1; |
tmplt.last_level = 0; |
tmplt.bind = PIPE_BIND_RENDER_TARGET; |
|
p->target = p->screen->resource_create(p->screen, &tmplt); |
} |
|
/* sampler texture */ |
{ |
uint32_t *ptr; |
struct pipe_transfer *t; |
struct pipe_resource t_tmplt; |
struct pipe_sampler_view v_tmplt; |
struct pipe_box box; |
|
memset(&t_tmplt, 0, sizeof(t_tmplt)); |
t_tmplt.target = PIPE_TEXTURE_2D; |
t_tmplt.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */ |
t_tmplt.width0 = 2; |
t_tmplt.height0 = 2; |
t_tmplt.depth0 = 1; |
t_tmplt.array_size = 1; |
t_tmplt.last_level = 0; |
t_tmplt.bind = PIPE_BIND_RENDER_TARGET; |
|
p->tex = p->screen->resource_create(p->screen, &t_tmplt); |
|
memset(&box, 0, sizeof(box)); |
box.width = 2; |
box.height = 2; |
|
ptr = p->pipe->transfer_map(p->pipe, p->tex, 0, PIPE_TRANSFER_WRITE, &box, &t); |
ptr[0] = 0xffff0000; |
ptr[1] = 0xff0000ff; |
ptr[2] = 0xff00ff00; |
ptr[3] = 0xffffff00; |
p->pipe->transfer_unmap(p->pipe, t); |
|
u_sampler_view_default_template(&v_tmplt, p->tex, p->tex->format); |
|
p->view = p->pipe->create_sampler_view(p->pipe, p->tex, &v_tmplt); |
} |
|
/* disabled blending/masking */ |
memset(&p->blend, 0, sizeof(p->blend)); |
p->blend.rt[0].colormask = PIPE_MASK_RGBA; |
|
/* no-op depth/stencil/alpha */ |
memset(&p->depthstencil, 0, sizeof(p->depthstencil)); |
|
/* rasterizer */ |
memset(&p->rasterizer, 0, sizeof(p->rasterizer)); |
p->rasterizer.cull_face = PIPE_FACE_NONE; |
p->rasterizer.half_pixel_center = 1; |
p->rasterizer.bottom_edge_rule = 1; |
p->rasterizer.depth_clip = 1; |
|
/* sampler */ |
memset(&p->sampler, 0, sizeof(p->sampler)); |
p->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
p->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
p->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
p->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; |
p->sampler.min_img_filter = PIPE_TEX_MIPFILTER_LINEAR; |
p->sampler.mag_img_filter = PIPE_TEX_MIPFILTER_LINEAR; |
p->sampler.normalized_coords = 1; |
|
surf_tmpl.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */ |
surf_tmpl.u.tex.level = 0; |
surf_tmpl.u.tex.first_layer = 0; |
surf_tmpl.u.tex.last_layer = 0; |
/* drawing destination */ |
memset(&p->framebuffer, 0, sizeof(p->framebuffer)); |
p->framebuffer.width = WIDTH; |
p->framebuffer.height = HEIGHT; |
p->framebuffer.nr_cbufs = 1; |
p->framebuffer.cbufs[0] = p->pipe->create_surface(p->pipe, p->target, &surf_tmpl); |
|
/* viewport, depth isn't really needed */ |
{ |
float x = 0; |
float y = 0; |
float z = FAR; |
float half_width = (float)WIDTH / 2.0f; |
float half_height = (float)HEIGHT / 2.0f; |
float half_depth = ((float)FAR - (float)NEAR) / 2.0f; |
float scale, bias; |
|
if (FLIP) { |
scale = -1.0f; |
bias = (float)HEIGHT; |
} else { |
scale = 1.0f; |
bias = 0.0f; |
} |
|
p->viewport.scale[0] = half_width; |
p->viewport.scale[1] = half_height * scale; |
p->viewport.scale[2] = half_depth; |
|
p->viewport.translate[0] = half_width + x; |
p->viewport.translate[1] = (half_height + y) * scale + bias; |
p->viewport.translate[2] = half_depth + z; |
} |
|
/* vertex elements state */ |
memset(p->velem, 0, sizeof(p->velem)); |
p->velem[0].src_offset = 0 * 4 * sizeof(float); /* offset 0, first element */ |
p->velem[0].instance_divisor = 0; |
p->velem[0].vertex_buffer_index = 0; |
p->velem[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
|
p->velem[1].src_offset = 1 * 4 * sizeof(float); /* offset 16, second element */ |
p->velem[1].instance_divisor = 0; |
p->velem[1].vertex_buffer_index = 0; |
p->velem[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
|
/* vertex shader */ |
{ |
const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, |
TGSI_SEMANTIC_GENERIC }; |
const uint semantic_indexes[] = { 0, 0 }; |
p->vs = util_make_vertex_passthrough_shader(p->pipe, 2, semantic_names, semantic_indexes, FALSE); |
} |
|
/* fragment shader */ |
p->fs = util_make_fragment_tex_shader(p->pipe, TGSI_TEXTURE_2D, TGSI_INTERPOLATE_LINEAR); |
} |
|
static void close_prog(struct program *p) |
{ |
cso_destroy_context(p->cso); |
|
p->pipe->delete_vs_state(p->pipe, p->vs); |
p->pipe->delete_fs_state(p->pipe, p->fs); |
|
pipe_surface_reference(&p->framebuffer.cbufs[0], NULL); |
pipe_sampler_view_reference(&p->view, NULL); |
pipe_resource_reference(&p->target, NULL); |
pipe_resource_reference(&p->tex, NULL); |
pipe_resource_reference(&p->vbuf, NULL); |
|
p->pipe->destroy(p->pipe); |
p->screen->destroy(p->screen); |
pipe_loader_release(&p->dev, 1); |
|
FREE(p); |
} |
|
static void draw(struct program *p) |
{ |
/* set the render target */ |
cso_set_framebuffer(p->cso, &p->framebuffer); |
|
/* clear the render target */ |
p->pipe->clear(p->pipe, PIPE_CLEAR_COLOR, &p->clear_color, 0, 0); |
|
/* set misc state we care about */ |
cso_set_blend(p->cso, &p->blend); |
cso_set_depth_stencil_alpha(p->cso, &p->depthstencil); |
cso_set_rasterizer(p->cso, &p->rasterizer); |
cso_set_viewport(p->cso, &p->viewport); |
|
/* sampler */ |
cso_single_sampler(p->cso, PIPE_SHADER_FRAGMENT, 0, &p->sampler); |
cso_single_sampler_done(p->cso, PIPE_SHADER_FRAGMENT); |
|
/* texture sampler view */ |
cso_set_sampler_views(p->cso, PIPE_SHADER_FRAGMENT, 1, &p->view); |
|
/* shaders */ |
cso_set_fragment_shader_handle(p->cso, p->fs); |
cso_set_vertex_shader_handle(p->cso, p->vs); |
|
/* vertex element data */ |
cso_set_vertex_elements(p->cso, 2, p->velem); |
|
util_draw_vertex_buffer(p->pipe, p->cso, |
p->vbuf, 0, 0, |
PIPE_PRIM_QUADS, |
4, /* verts */ |
2); /* attribs/vert */ |
|
p->pipe->flush(p->pipe, NULL, 0); |
|
debug_dump_surface_bmp(p->pipe, "result.bmp", p->framebuffer.cbufs[0]); |
} |
|
int main(int argc, char** argv) |
{ |
struct program *p = CALLOC_STRUCT(program); |
|
init_prog(p); |
draw(p); |
close_prog(p); |
|
return 0; |
} |