/**
* Render a polygon silhouette to stencil buffer.
*/
void renderer_polygon_stencil(struct renderer *renderer,
struct pipe_vertex_buffer *vbuf,
VGuint mode, VGuint start, VGuint count)
{
assert(renderer->state == RENDERER_STATE_POLYGON_STENCIL);
cso_set_vertex_buffers(renderer->cso, 0, 1, vbuf);
if (!renderer->u.polygon_stencil.manual_two_sides) {
cso_draw_arrays(renderer->cso, mode, start, count);
}
else {
struct pipe_rasterizer_state raster;
struct pipe_depth_stencil_alpha_state dsa;
raster = renderer->g3d.rasterizer;
dsa = renderer->u.polygon_stencil.dsa;
/* front */
raster.cull_face = PIPE_FACE_BACK;
dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_INCR_WRAP;
cso_set_rasterizer(renderer->cso, &raster);
cso_set_depth_stencil_alpha(renderer->cso, &dsa);
cso_draw_arrays(renderer->cso, mode, start, count);
/* back */
raster.cull_face = PIPE_FACE_FRONT;
dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_DECR_WRAP;
cso_set_rasterizer(renderer->cso, &raster);
cso_set_depth_stencil_alpha(renderer->cso, &dsa);
cso_draw_arrays(renderer->cso, mode, start, count);
}
}
/**
* Draw a simple vertex buffer / primitive.
* Limited to float[4] vertex attribs, tightly packed.
*/
void
util_draw_vertex_buffer(struct pipe_context *pipe,
struct cso_context *cso,
struct pipe_resource *vbuf,
uint offset,
uint prim_type,
uint num_verts,
uint num_attribs)
{
struct pipe_vertex_buffer vbuffer;
assert(num_attribs <= PIPE_MAX_ATTRIBS);
/* tell pipe about the vertex buffer */
memset(&vbuffer, 0, sizeof(vbuffer));
vbuffer.buffer = vbuf;
vbuffer.stride = num_attribs * 4 * sizeof(float); /* vertex size */
vbuffer.buffer_offset = offset;
/* note: vertex elements already set by caller */
if (cso) {
cso_set_vertex_buffers(cso, 1, &vbuffer);
cso_draw_arrays(cso, prim_type, 0, num_verts);
} else {
pipe->set_vertex_buffers(pipe, 1, &vbuffer);
util_draw_arrays(pipe, prim_type, 0, num_verts);
}
}
/**
* Draw a simple vertex buffer / primitive.
* Limited to float[4] vertex attribs, tightly packed.
*/
void
util_draw_user_vertex_buffer(struct cso_context *cso, void *buffer,
uint prim_type, uint num_verts, uint num_attribs)
{
struct pipe_vertex_buffer vbuffer = {0};
assert(num_attribs <= PIPE_MAX_ATTRIBS);
vbuffer.user_buffer = buffer;
vbuffer.stride = num_attribs * 4 * sizeof(float); /* vertex size */
/* note: vertex elements already set by caller */
cso_set_vertex_buffers(cso, 1, &vbuffer);
cso_draw_arrays(cso, prim_type, 0, num_verts);
}
/**
* Called via ctx->Driver.DrawAtlasBitmap()
*/
static void
st_DrawAtlasBitmaps(struct gl_context *ctx,
const struct gl_bitmap_atlas *atlas,
GLuint count, const GLubyte *ids)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct st_texture_object *stObj = st_texture_object(atlas->texObj);
struct pipe_sampler_view *sv;
/* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
const float z = ctx->Current.RasterPos[2] * 2.0f - 1.0f;
const float *color = ctx->Current.RasterColor;
const float clip_x_scale = 2.0f / st->state.framebuffer.width;
const float clip_y_scale = 2.0f / st->state.framebuffer.height;
const unsigned num_verts = count * 4;
const unsigned num_vert_bytes = num_verts * sizeof(struct st_util_vertex);
struct st_util_vertex *verts;
struct pipe_vertex_buffer vb = {0};
unsigned i;
if (!st->bitmap.cache) {
init_bitmap_state(st);
}
st_flush_bitmap_cache(st);
st_validate_state(st, ST_PIPELINE_RENDER);
st_invalidate_readpix_cache(st);
sv = st_create_texture_sampler_view(pipe, stObj->pt);
if (!sv) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCallLists(bitmap text)");
return;
}
setup_render_state(ctx, sv, color, true);
vb.stride = sizeof(struct st_util_vertex);
u_upload_alloc(st->uploader, 0, num_vert_bytes, 4,
&vb.buffer_offset, &vb.buffer, (void **) &verts);
/* build quads vertex data */
for (i = 0; i < count; i++) {
const GLfloat epsilon = 0.0001F;
const struct gl_bitmap_glyph *g = &atlas->glyphs[ids[i]];
const float xmove = g->xmove, ymove = g->ymove;
const float xorig = g->xorig, yorig = g->yorig;
const float s0 = g->x, t0 = g->y;
const float s1 = s0 + g->w, t1 = t0 + g->h;
const float x0 = IFLOOR(ctx->Current.RasterPos[0] - xorig + epsilon);
const float y0 = IFLOOR(ctx->Current.RasterPos[1] - yorig + epsilon);
const float x1 = x0 + g->w, y1 = y0 + g->h;
const float clip_x0 = x0 * clip_x_scale - 1.0f;
const float clip_y0 = y0 * clip_y_scale - 1.0f;
const float clip_x1 = x1 * clip_x_scale - 1.0f;
const float clip_y1 = y1 * clip_y_scale - 1.0f;
/* lower-left corner */
verts->x = clip_x0;
verts->y = clip_y0;
verts->z = z;
verts->r = color[0];
verts->g = color[1];
verts->b = color[2];
verts->a = color[3];
verts->s = s0;
verts->t = t0;
verts++;
/* lower-right corner */
verts->x = clip_x1;
verts->y = clip_y0;
verts->z = z;
verts->r = color[0];
verts->g = color[1];
verts->b = color[2];
verts->a = color[3];
verts->s = s1;
verts->t = t0;
verts++;
/* upper-right corner */
verts->x = clip_x1;
verts->y = clip_y1;
verts->z = z;
verts->r = color[0];
verts->g = color[1];
verts->b = color[2];
verts->a = color[3];
verts->s = s1;
verts->t = t1;
verts++;
/* upper-left corner */
verts->x = clip_x0;
verts->y = clip_y1;
verts->z = z;
verts->r = color[0];
verts->g = color[1];
verts->b = color[2];
verts->a = color[3];
verts->s = s0;
verts->t = t1;
verts++;
/* Update the raster position */
ctx->Current.RasterPos[0] += xmove;
ctx->Current.RasterPos[1] += ymove;
}
u_upload_unmap(st->uploader);
cso_set_vertex_buffers(st->cso_context,
cso_get_aux_vertex_buffer_slot(st->cso_context),
1, &vb);
cso_draw_arrays(st->cso_context, PIPE_PRIM_QUADS, 0, num_verts);
restore_render_state(ctx);
pipe_resource_reference(&vb.buffer, NULL);
pipe_sampler_view_reference(&sv, NULL);
/* We uploaded modified constants, need to invalidate them. */
st->dirty |= ST_NEW_FS_CONSTANTS;
}
/* Setup all vertex pipeline state, rasterizer state, and fragment shader
* constants, and issue the draw call for PBO upload/download.
*
* The caller is responsible for saving and restoring state, as well as for
* setting other fragment shader state (fragment shader, samplers), and
* framebuffer/viewport/DSA/blend state.
*/
bool
st_pbo_draw(struct st_context *st, const struct st_pbo_addresses *addr,
unsigned surface_width, unsigned surface_height)
{
struct cso_context *cso = st->cso_context;
/* Setup vertex and geometry shaders */
if (!st->pbo.vs) {
st->pbo.vs = st_pbo_create_vs(st);
if (!st->pbo.vs)
return false;
}
if (addr->depth != 1 && st->pbo.use_gs && !st->pbo.gs) {
st->pbo.gs = st_pbo_create_gs(st);
if (!st->pbo.gs)
return false;
}
cso_set_vertex_shader_handle(cso, st->pbo.vs);
cso_set_geometry_shader_handle(cso, addr->depth != 1 ? st->pbo.gs : NULL);
cso_set_tessctrl_shader_handle(cso, NULL);
cso_set_tesseval_shader_handle(cso, NULL);
/* Upload vertices */
{
struct pipe_vertex_buffer vbo = {0};
struct pipe_vertex_element velem;
float x0 = (float) addr->xoffset / surface_width * 2.0f - 1.0f;
float y0 = (float) addr->yoffset / surface_height * 2.0f - 1.0f;
float x1 = (float) (addr->xoffset + addr->width) / surface_width * 2.0f - 1.0f;
float y1 = (float) (addr->yoffset + addr->height) / surface_height * 2.0f - 1.0f;
float *verts = NULL;
vbo.stride = 2 * sizeof(float);
u_upload_alloc(st->pipe->stream_uploader, 0, 8 * sizeof(float), 4,
&vbo.buffer_offset, &vbo.buffer.resource, (void **) &verts);
if (!verts)
return false;
verts[0] = x0;
verts[1] = y0;
verts[2] = x0;
verts[3] = y1;
verts[4] = x1;
verts[5] = y0;
verts[6] = x1;
verts[7] = y1;
u_upload_unmap(st->pipe->stream_uploader);
velem.src_offset = 0;
velem.instance_divisor = 0;
velem.vertex_buffer_index = 0;
velem.src_format = PIPE_FORMAT_R32G32_FLOAT;
cso_set_vertex_elements(cso, 1, &velem);
cso_set_vertex_buffers(cso, velem.vertex_buffer_index, 1, &vbo);
pipe_resource_reference(&vbo.buffer.resource, NULL);
}
/* Upload constants */
{
struct pipe_constant_buffer cb;
cb.buffer = NULL;
cb.user_buffer = &addr->constants;
cb.buffer_offset = 0;
cb.buffer_size = sizeof(addr->constants);
cso_set_constant_buffer(cso, PIPE_SHADER_FRAGMENT, 0, &cb);
pipe_resource_reference(&cb.buffer, NULL);
}
/* Rasterizer state */
cso_set_rasterizer(cso, &st->pbo.raster);
/* Disable stream output */
cso_set_stream_outputs(cso, 0, NULL, 0);
if (addr->depth == 1) {
cso_draw_arrays(cso, PIPE_PRIM_TRIANGLE_STRIP, 0, 4);
} else {
cso_draw_arrays_instanced(cso, PIPE_PRIM_TRIANGLE_STRIP,
0, 4, 0, addr->depth);
}
return true;
}
/**
* Draw a quad with given position, texcoords and color.
*/
bool
st_draw_quad(struct st_context *st,
float x0, float y0, float x1, float y1, float z,
float s0, float t0, float s1, float t1,
const float *color,
unsigned num_instances)
{
struct pipe_vertex_buffer vb = {0};
struct st_util_vertex *verts;
vb.stride = sizeof(struct st_util_vertex);
u_upload_alloc(st->uploader, 0, 4 * sizeof(struct st_util_vertex), 4,
&vb.buffer_offset, &vb.buffer, (void **) &verts);
if (!vb.buffer) {
return false;
}
/* lower-left */
verts[0].x = x0;
verts[0].y = y1;
verts[0].z = z;
verts[0].r = color[0];
verts[0].g = color[1];
verts[0].b = color[2];
verts[0].a = color[3];
verts[0].s = s0;
verts[0].t = t0;
/* lower-right */
verts[1].x = x1;
verts[1].y = y1;
verts[1].z = z;
verts[1].r = color[0];
verts[1].g = color[1];
verts[1].b = color[2];
verts[1].a = color[3];
verts[1].s = s1;
verts[1].t = t0;
/* upper-right */
verts[2].x = x1;
verts[2].y = y0;
verts[2].z = z;
verts[2].r = color[0];
verts[2].g = color[1];
verts[2].b = color[2];
verts[2].a = color[3];
verts[2].s = s1;
verts[2].t = t1;
/* upper-left */
verts[3].x = x0;
verts[3].y = y0;
verts[3].z = z;
verts[3].r = color[0];
verts[3].g = color[1];
verts[3].b = color[2];
verts[3].a = color[3];
verts[3].s = s0;
verts[3].t = t1;
u_upload_unmap(st->uploader);
/* At the time of writing, cso_get_aux_vertex_buffer_slot() always returns
* zero. If that ever changes we need to audit the calls to that function
* and make sure the slot number is used consistently everywhere.
*/
assert(cso_get_aux_vertex_buffer_slot(st->cso_context) == 0);
cso_set_vertex_buffers(st->cso_context,
cso_get_aux_vertex_buffer_slot(st->cso_context),
1, &vb);
if (num_instances > 1) {
cso_draw_arrays_instanced(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4,
0, num_instances);
} else {
cso_draw_arrays(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4);
}
pipe_resource_reference(&vb.buffer, NULL);
return true;
}
