/**
* Restore the state which was saved by cso_save_state().
*/
void
cso_restore_state(struct cso_context *cso)
{
unsigned state_mask = cso->saved_state;
assert(state_mask);
if (state_mask & CSO_BIT_AUX_VERTEX_BUFFER_SLOT)
cso_restore_aux_vertex_buffer_slot(cso);
if (state_mask & CSO_BIT_BLEND)
cso_restore_blend(cso);
if (state_mask & CSO_BIT_DEPTH_STENCIL_ALPHA)
cso_restore_depth_stencil_alpha(cso);
if (state_mask & CSO_BIT_FRAGMENT_SAMPLERS)
cso_restore_fragment_samplers(cso);
if (state_mask & CSO_BIT_FRAGMENT_SAMPLER_VIEWS)
cso_restore_fragment_sampler_views(cso);
if (state_mask & CSO_BIT_FRAGMENT_SHADER)
cso_restore_fragment_shader(cso);
if (state_mask & CSO_BIT_FRAMEBUFFER)
cso_restore_framebuffer(cso);
if (state_mask & CSO_BIT_GEOMETRY_SHADER)
cso_restore_geometry_shader(cso);
if (state_mask & CSO_BIT_MIN_SAMPLES)
cso_restore_min_samples(cso);
if (state_mask & CSO_BIT_RASTERIZER)
cso_restore_rasterizer(cso);
if (state_mask & CSO_BIT_RENDER_CONDITION)
cso_restore_render_condition(cso);
if (state_mask & CSO_BIT_SAMPLE_MASK)
cso_restore_sample_mask(cso);
if (state_mask & CSO_BIT_STENCIL_REF)
cso_restore_stencil_ref(cso);
if (state_mask & CSO_BIT_STREAM_OUTPUTS)
cso_restore_stream_outputs(cso);
if (state_mask & CSO_BIT_TESSCTRL_SHADER)
cso_restore_tessctrl_shader(cso);
if (state_mask & CSO_BIT_TESSEVAL_SHADER)
cso_restore_tesseval_shader(cso);
if (state_mask & CSO_BIT_VERTEX_ELEMENTS)
cso_restore_vertex_elements(cso);
if (state_mask & CSO_BIT_VERTEX_SHADER)
cso_restore_vertex_shader(cso);
if (state_mask & CSO_BIT_VIEWPORT)
cso_restore_viewport(cso);
if (state_mask & CSO_BIT_PAUSE_QUERIES)
cso->pipe->set_active_query_state(cso->pipe, true);
cso->saved_state = 0;
}
/**
* Render a glBitmap by drawing a textured quad
*/
static void
draw_bitmap_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
GLsizei width, GLsizei height,
struct pipe_sampler_view *sv,
const GLfloat *color)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct cso_context *cso = st->cso_context;
struct st_fp_variant *fpv;
struct st_fp_variant_key key;
GLuint maxSize;
GLuint offset;
struct pipe_resource *vbuf = NULL;
memset(&key, 0, sizeof(key));
key.st = st;
key.bitmap = GL_TRUE;
key.clamp_color = st->clamp_frag_color_in_shader &&
st->ctx->Color._ClampFragmentColor;
fpv = st_get_fp_variant(st, st->fp, &key);
/* As an optimization, Mesa's fragment programs will sometimes get the
* primary color from a statevar/constant rather than a varying variable.
* when that's the case, we need to ensure that we use the 'color'
* parameter and not the current attribute color (which may have changed
* through glRasterPos and state validation.
* So, we force the proper color here. Not elegant, but it works.
*/
{
GLfloat colorSave[4];
COPY_4V(colorSave, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);
COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color);
st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT);
COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], colorSave);
}
/* limit checks */
/* XXX if the bitmap is larger than the max texture size, break
* it up into chunks.
*/
maxSize = 1 << (pipe->screen->get_param(pipe->screen,
PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1);
assert(width <= (GLsizei)maxSize);
assert(height <= (GLsizei)maxSize);
cso_save_rasterizer(cso);
cso_save_samplers(cso, PIPE_SHADER_FRAGMENT);
cso_save_sampler_views(cso, PIPE_SHADER_FRAGMENT);
cso_save_viewport(cso);
cso_save_fragment_shader(cso);
cso_save_stream_outputs(cso);
cso_save_vertex_shader(cso);
cso_save_tessctrl_shader(cso);
cso_save_tesseval_shader(cso);
cso_save_geometry_shader(cso);
cso_save_vertex_elements(cso);
cso_save_aux_vertex_buffer_slot(cso);
/* rasterizer state: just scissor */
st->bitmap.rasterizer.scissor = ctx->Scissor.EnableFlags & 1;
cso_set_rasterizer(cso, &st->bitmap.rasterizer);
/* fragment shader state: TEX lookup program */
cso_set_fragment_shader_handle(cso, fpv->driver_shader);
/* vertex shader state: position + texcoord pass-through */
cso_set_vertex_shader_handle(cso, st->bitmap.vs);
/* disable other shaders */
cso_set_tessctrl_shader_handle(cso, NULL);
cso_set_tesseval_shader_handle(cso, NULL);
cso_set_geometry_shader_handle(cso, NULL);
/* user samplers, plus our bitmap sampler */
{
struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS];
uint num = MAX2(fpv->bitmap_sampler + 1,
st->state.num_samplers[PIPE_SHADER_FRAGMENT]);
uint i;
for (i = 0; i < st->state.num_samplers[PIPE_SHADER_FRAGMENT]; i++) {
samplers[i] = &st->state.samplers[PIPE_SHADER_FRAGMENT][i];
}
samplers[fpv->bitmap_sampler] =
&st->bitmap.samplers[sv->texture->target != PIPE_TEXTURE_RECT];
cso_set_samplers(cso, PIPE_SHADER_FRAGMENT, num,
(const struct pipe_sampler_state **) samplers);
}
/* user textures, plus the bitmap texture */
{
struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS];
uint num = MAX2(fpv->bitmap_sampler + 1,
st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]);
memcpy(sampler_views, st->state.sampler_views[PIPE_SHADER_FRAGMENT],
sizeof(sampler_views));
sampler_views[fpv->bitmap_sampler] = sv;
cso_set_sampler_views(cso, PIPE_SHADER_FRAGMENT, num, sampler_views);
}
/* viewport state: viewport matching window dims */
{
const GLboolean invert = st->state.fb_orientation == Y_0_TOP;
const GLfloat width = (GLfloat)st->state.framebuffer.width;
const GLfloat height = (GLfloat)st->state.framebuffer.height;
struct pipe_viewport_state vp;
vp.scale[0] = 0.5f * width;
vp.scale[1] = height * (invert ? -0.5f : 0.5f);
vp.scale[2] = 0.5f;
vp.translate[0] = 0.5f * width;
vp.translate[1] = 0.5f * height;
vp.translate[2] = 0.5f;
cso_set_viewport(cso, &vp);
}
cso_set_vertex_elements(cso, 3, st->velems_util_draw);
cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
/* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
z = z * 2.0f - 1.0f;
/* draw textured quad */
setup_bitmap_vertex_data(st, sv->texture->target != PIPE_TEXTURE_RECT,
x, y, width, height, z, color, &vbuf, &offset);
if (vbuf) {
util_draw_vertex_buffer(pipe, st->cso_context, vbuf,
cso_get_aux_vertex_buffer_slot(st->cso_context),
offset,
PIPE_PRIM_TRIANGLE_FAN,
4, /* verts */
3); /* attribs/vert */
}
/* restore state */
cso_restore_rasterizer(cso);
cso_restore_samplers(cso, PIPE_SHADER_FRAGMENT);
cso_restore_sampler_views(cso, PIPE_SHADER_FRAGMENT);
cso_restore_viewport(cso);
cso_restore_fragment_shader(cso);
cso_restore_vertex_shader(cso);
cso_restore_tessctrl_shader(cso);
cso_restore_tesseval_shader(cso);
cso_restore_geometry_shader(cso);
cso_restore_vertex_elements(cso);
cso_restore_aux_vertex_buffer_slot(cso);
cso_restore_stream_outputs(cso);
pipe_resource_reference(&vbuf, NULL);
}