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#include <mbgl/renderer/symbol_bucket.hpp>
#include <mbgl/renderer/painter.hpp>
#include <mbgl/style/layers/symbol_layer.hpp>
#include <mbgl/shader/sdf_shader.hpp>
#include <mbgl/shader/icon_shader.hpp>
#include <mbgl/shader/collision_box_shader.hpp>
#include <mbgl/gl/gl.hpp>
namespace mbgl {
using namespace style;
SymbolBucket::SymbolBucket(const MapMode mode_,
style::SymbolLayoutProperties layout_,
bool sdfIcons_,
bool iconsNeedLinear_)
: mode(mode_),
layout(std::move(layout_)),
sdfIcons(sdfIcons_),
iconsNeedLinear(iconsNeedLinear_) {
}
void SymbolBucket::upload(gl::Context& context) {
if (hasTextData()) {
text.vertices.upload(context);
text.triangles.upload(context);
}
if (hasIconData()) {
icon.vertices.upload(context);
icon.triangles.upload(context);
}
uploaded = true;
}
void SymbolBucket::render(Painter& painter,
PaintParameters& parameters,
const Layer& layer,
const RenderTile& tile) {
painter.renderSymbol(parameters, *this, *layer.as<SymbolLayer>(), tile);
}
bool SymbolBucket::hasData() const {
assert(false); // Should be calling SymbolLayout::hasSymbolInstances() instead.
return false;
}
bool SymbolBucket::hasTextData() const {
return !text.groups.empty();
}
bool SymbolBucket::hasIconData() const {
return !icon.groups.empty();
}
bool SymbolBucket::hasCollisionBoxData() const {
return !collisionBox.groups.empty();
}
bool SymbolBucket::needsClipping() const {
return mode == MapMode::Still;
}
void SymbolBucket::drawGlyphs(SDFShader& shader,
gl::Context& context,
PaintMode paintMode) {
GLbyte* vertex_index = BUFFER_OFFSET_0;
GLbyte* elements_index = BUFFER_OFFSET_0;
for (auto& group : text.groups) {
assert(group);
group->array[paintMode == PaintMode::Overdraw ? 1 : 0].bind(
shader, text.vertices, text.triangles, vertex_index, context);
MBGL_CHECK_ERROR(glDrawElements(GL_TRIANGLES, group->elements_length * 3, GL_UNSIGNED_SHORT,
elements_index));
vertex_index += group->vertex_length * text.vertices.itemSize;
elements_index += group->elements_length * text.triangles.itemSize;
}
}
void SymbolBucket::drawIcons(SDFShader& shader,
gl::Context& context,
PaintMode paintMode) {
GLbyte* vertex_index = BUFFER_OFFSET_0;
GLbyte* elements_index = BUFFER_OFFSET_0;
for (auto& group : icon.groups) {
assert(group);
group->array[paintMode == PaintMode::Overdraw ? 1 : 0].bind(
shader, icon.vertices, icon.triangles, vertex_index, context);
MBGL_CHECK_ERROR(glDrawElements(GL_TRIANGLES, group->elements_length * 3, GL_UNSIGNED_SHORT,
elements_index));
vertex_index += group->vertex_length * icon.vertices.itemSize;
elements_index += group->elements_length * icon.triangles.itemSize;
}
}
void SymbolBucket::drawIcons(IconShader& shader,
gl::Context& context,
PaintMode paintMode) {
GLbyte* vertex_index = BUFFER_OFFSET_0;
GLbyte* elements_index = BUFFER_OFFSET_0;
for (auto& group : icon.groups) {
assert(group);
group->array[paintMode == PaintMode::Overdraw ? 3 : 2].bind(
shader, icon.vertices, icon.triangles, vertex_index, context);
MBGL_CHECK_ERROR(glDrawElements(GL_TRIANGLES, group->elements_length * 3, GL_UNSIGNED_SHORT,
elements_index));
vertex_index += group->vertex_length * icon.vertices.itemSize;
elements_index += group->elements_length * icon.triangles.itemSize;
}
}
void SymbolBucket::drawCollisionBoxes(CollisionBoxShader& shader,
gl::Context& context) {
GLbyte* vertex_index = BUFFER_OFFSET_0;
for (auto& group : collisionBox.groups) {
group->array[0].bind(shader, collisionBox.vertices, vertex_index, context);
MBGL_CHECK_ERROR(glDrawArrays(GL_LINES, 0, group->vertex_length));
}
}
} // namespace mbgl
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