/* Second state atom for user clip planes:
*/
static void update_clip( struct st_context *st )
{
struct pipe_clip_state clip;
const struct gl_context *ctx = st->ctx;
bool use_eye = FALSE;
STATIC_ASSERT(sizeof(clip.ucp) <= sizeof(ctx->Transform._ClipUserPlane));
/* if we have a vertex shader that writes clip vertex we need to pass
the pre-projection transformed coordinates into the driver. */
if (st->vp) {
if (ctx->Shader.CurrentVertexProgram)
use_eye = TRUE;
}
memcpy(clip.ucp,
use_eye ? ctx->Transform.EyeUserPlane
: ctx->Transform._ClipUserPlane, sizeof(clip.ucp));
st->state.clip = clip;
cso_set_clip(st->cso_context, &clip);
}
/* Second state atom for user clip planes:
*/
static void update_clip( struct st_context *st )
{
struct pipe_clip_state clip;
GLuint i;
memset(&clip, 0, sizeof(clip));
for (i = 0; i < PIPE_MAX_CLIP_PLANES; i++) {
if (st->ctx->Transform.ClipPlanesEnabled & (1 << i)) {
memcpy(clip.ucp[clip.nr],
st->ctx->Transform._ClipUserPlane[i],
sizeof(clip.ucp[0]));
clip.nr++;
}
}
clip.depth_clamp = st->ctx->Transform.DepthClamp != GL_FALSE;
if (memcmp(&clip, &st->state.clip, sizeof(clip)) != 0) {
st->state.clip = clip;
cso_set_clip(st->cso_context, &clip);
}
}
/**
* Do glClear by drawing a quadrilateral.
* The vertices of the quad will be computed from the
* ctx->DrawBuffer->_X/Ymin/max fields.
*/
static void
clear_with_quad(struct gl_context *ctx,
GLboolean color, GLboolean depth, GLboolean stencil)
{
struct st_context *st = st_context(ctx);
const struct gl_framebuffer *fb = ctx->DrawBuffer;
const GLfloat fb_width = (GLfloat) fb->Width;
const GLfloat fb_height = (GLfloat) fb->Height;
const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin / fb_width * 2.0f - 1.0f;
const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax / fb_width * 2.0f - 1.0f;
const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin / fb_height * 2.0f - 1.0f;
const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax / fb_height * 2.0f - 1.0f;
float clearColor[4];
/*
printf("%s %s%s%s %f,%f %f,%f\n", __FUNCTION__,
color ? "color, " : "",
depth ? "depth, " : "",
stencil ? "stencil" : "",
x0, y0,
x1, y1);
*/
cso_save_blend(st->cso_context);
cso_save_stencil_ref(st->cso_context);
cso_save_depth_stencil_alpha(st->cso_context);
cso_save_rasterizer(st->cso_context);
cso_save_viewport(st->cso_context);
cso_save_clip(st->cso_context);
cso_save_fragment_shader(st->cso_context);
cso_save_vertex_shader(st->cso_context);
cso_save_vertex_elements(st->cso_context);
cso_save_vertex_buffers(st->cso_context);
/* blend state: RGBA masking */
{
struct pipe_blend_state blend;
memset(&blend, 0, sizeof(blend));
blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
if (color) {
if (ctx->Color.ColorMask[0][0])
blend.rt[0].colormask |= PIPE_MASK_R;
if (ctx->Color.ColorMask[0][1])
blend.rt[0].colormask |= PIPE_MASK_G;
if (ctx->Color.ColorMask[0][2])
blend.rt[0].colormask |= PIPE_MASK_B;
if (ctx->Color.ColorMask[0][3])
blend.rt[0].colormask |= PIPE_MASK_A;
if (st->ctx->Color.DitherFlag)
blend.dither = 1;
}
cso_set_blend(st->cso_context, &blend);
}
/* depth_stencil state: always pass/set to ref value */
{
struct pipe_depth_stencil_alpha_state depth_stencil;
memset(&depth_stencil, 0, sizeof(depth_stencil));
if (depth) {
depth_stencil.depth.enabled = 1;
depth_stencil.depth.writemask = 1;
depth_stencil.depth.func = PIPE_FUNC_ALWAYS;
}
if (stencil) {
struct pipe_stencil_ref stencil_ref;
memset(&stencil_ref, 0, sizeof(stencil_ref));
depth_stencil.stencil[0].enabled = 1;
depth_stencil.stencil[0].func = PIPE_FUNC_ALWAYS;
depth_stencil.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
depth_stencil.stencil[0].valuemask = 0xff;
depth_stencil.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
stencil_ref.ref_value[0] = ctx->Stencil.Clear;
cso_set_stencil_ref(st->cso_context, &stencil_ref);
}
cso_set_depth_stencil_alpha(st->cso_context, &depth_stencil);
}
cso_set_vertex_elements(st->cso_context, 2, st->velems_util_draw);
cso_set_rasterizer(st->cso_context, &st->clear.raster);
/* viewport state: viewport matching window dims */
{
const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP);
struct pipe_viewport_state vp;
vp.scale[0] = 0.5f * fb_width;
vp.scale[1] = fb_height * (invert ? -0.5f : 0.5f);
vp.scale[2] = 1.0f;
vp.scale[3] = 1.0f;
vp.translate[0] = 0.5f * fb_width;
vp.translate[1] = 0.5f * fb_height;
vp.translate[2] = 0.0f;
vp.translate[3] = 0.0f;
cso_set_viewport(st->cso_context, &vp);
}
cso_set_clip(st->cso_context, &st->clear.clip);
set_fragment_shader(st);
set_vertex_shader(st);
if (ctx->DrawBuffer->_ColorDrawBuffers[0]) {
st_translate_color(ctx->Color.ClearColorUnclamped,
ctx->DrawBuffer->_ColorDrawBuffers[0]->_BaseFormat,
clearColor);
}
/* draw quad matching scissor rect */
draw_quad(st, x0, y0, x1, y1, (GLfloat) ctx->Depth.Clear, clearColor);
/* Restore pipe state */
cso_restore_blend(st->cso_context);
cso_restore_stencil_ref(st->cso_context);
cso_restore_depth_stencil_alpha(st->cso_context);
cso_restore_rasterizer(st->cso_context);
cso_restore_viewport(st->cso_context);
cso_restore_clip(st->cso_context);
cso_restore_fragment_shader(st->cso_context);
cso_restore_vertex_shader(st->cso_context);
cso_restore_vertex_elements(st->cso_context);
cso_restore_vertex_buffers(st->cso_context);
}
