/* Helper function to build a subset of a driver stack consisting of
* one of the software rasterizers (llvmpipe, softpipe) and the
* xlib winsys.
*/
static struct pipe_screen *
swrast_xlib_create_screen( Display *display )
{
struct sw_winsys *winsys;
struct pipe_screen *screen = NULL;
/* Create the underlying winsys, which performs presents to Xlib
* drawables:
*/
winsys = xlib_create_sw_winsys( display );
if (winsys == NULL)
return NULL;
/* Create a software rasterizer on top of that winsys:
*/
screen = sw_screen_create( winsys );
if (screen == NULL)
goto fail;
/* Inject any wrapping layers we want to here:
*/
return debug_screen_wrap( screen );
fail:
if (winsys)
winsys->destroy( winsys );
return NULL;
}
status_t
GalliumContext::CreateScreen()
{
CALLED();
// Allocate winsys and attach callback hooks
struct sw_winsys* winsys = hgl_create_sw_winsys();
if (!winsys) {
ERROR("%s: Couldn't allocate sw_winsys!\n", __func__);
return B_ERROR;
}
fScreen = sw_screen_create(winsys);
if (fScreen == NULL) {
ERROR("%s: Couldn't create screen!\n", __FUNCTION__);
FREE(winsys);
return B_ERROR;
}
debug_screen_wrap(fScreen);
const char* driverName = fScreen->get_name(fScreen);
ERROR("%s: Using %s driver.\n", __func__, driverName);
return B_OK;
}
struct pipe_screen *
swrast_create_screen(struct sw_winsys *ws)
{
struct pipe_screen *screen;
screen = sw_screen_create(ws);
if (screen)
screen = debug_screen_wrap(screen);
return screen;
}
static void init_prog(struct program *p)
{
struct pipe_surface surf_tmpl;
/* create the software rasterizer */
p->screen = sw_screen_create(null_sw_create());
/* wrap the screen with any debugger */
p->screen = debug_screen_wrap(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_STATIC, 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;
t = p->pipe->get_transfer(p->pipe, p->tex, 0, PIPE_TRANSFER_WRITE, &box);
ptr = p->pipe->transfer_map(p->pipe, t);
ptr[0] = 0xffff0000;
ptr[1] = 0xff0000ff;
ptr[2] = 0xff00ff00;
ptr[3] = 0xffffff00;
p->pipe->transfer_unmap(p->pipe, t);
p->pipe->transfer_destroy(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.gl_rasterization_rules = 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.usage = PIPE_BIND_RENDER_TARGET;
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.scale[3] = 1.0f;
p->viewport.translate[0] = half_width + x;
p->viewport.translate[1] = (half_height + y) * scale + bias;
p->viewport.translate[2] = half_depth + z;
p->viewport.translate[3] = 0.0f;
}
/* 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);
}
/* fragment shader */
p->fs = util_make_fragment_tex_shader(p->pipe, TGSI_TEXTURE_2D, TGSI_INTERPOLATE_LINEAR);
}