void Painter::drawClippingMasks(PaintParameters& parameters, const std::map<UnwrappedTileID, ClipID>& stencils) {
MBGL_DEBUG_GROUP("clipping masks");
auto& plainShader = parameters.shaders.plain;
auto& arrayCoveringPlain = parameters.shaders.coveringPlainArray;
mat4 matrix;
const GLuint mask = 0b11111111;
config.program = plainShader.getID();
config.stencilOp.reset();
config.stencilTest = GL_TRUE;
config.depthTest = GL_FALSE;
config.depthMask = GL_FALSE;
config.colorMask = { GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE };
config.stencilMask = mask;
arrayCoveringPlain.bind(plainShader, tileStencilBuffer, BUFFER_OFFSET_0, store);
for (const auto& stencil : stencils) {
const auto& id = stencil.first;
const auto& clip = stencil.second;
MBGL_DEBUG_GROUP(std::string{ "mask: " } + util::toString(id));
state.matrixFor(matrix, id);
matrix::multiply(matrix, projMatrix, matrix);
plainShader.u_matrix = matrix;
const GLint ref = (GLint)(clip.reference.to_ulong());
config.stencilFunc = { GL_ALWAYS, ref, mask };
MBGL_CHECK_ERROR(glDrawArrays(GL_TRIANGLES, 0, (GLsizei)tileStencilBuffer.index()));
}
}
void Painter::renderTileDebug(const RenderTile& renderTile) {
if (frame.debugOptions == MapDebugOptions::NoDebug)
return;
MBGL_DEBUG_GROUP(std::string { "debug " } + util::toString(renderTile.id));
auto draw = [&] (Color color, const auto& vertexBuffer, const auto& indexBuffer, const auto& segments, auto drawMode) {
programs->debug.draw(
context,
drawMode,
gl::DepthMode::disabled(),
stencilModeForClipping(renderTile.clip),
gl::ColorMode::unblended(),
DebugProgram::UniformValues {
uniforms::u_matrix::Value{ renderTile.matrix },
uniforms::u_color::Value{ color }
},
vertexBuffer,
indexBuffer,
segments
);
};
if (frame.debugOptions & (MapDebugOptions::Timestamps | MapDebugOptions::ParseStatus)) {
Tile& tile = renderTile.tile;
if (!tile.debugBucket || tile.debugBucket->renderable != tile.isRenderable() ||
tile.debugBucket->complete != tile.isComplete() ||
!(tile.debugBucket->modified == tile.modified) ||
!(tile.debugBucket->expires == tile.expires) ||
tile.debugBucket->debugMode != frame.debugOptions) {
tile.debugBucket = std::make_unique<DebugBucket>(
tile.id, tile.isRenderable(), tile.isComplete(), tile.modified,
tile.expires, frame.debugOptions, context);
}
draw(Color::white(),
*tile.debugBucket->vertexBuffer,
*tile.debugBucket->indexBuffer,
tile.debugBucket->segments,
gl::Lines { 4.0f * frame.pixelRatio });
draw(Color::black(),
*tile.debugBucket->vertexBuffer,
*tile.debugBucket->indexBuffer,
tile.debugBucket->segments,
gl::Lines { 2.0f * frame.pixelRatio });
}
if (frame.debugOptions & MapDebugOptions::TileBorders) {
draw(Color::red(),
tileVertexBuffer,
tileBorderIndexBuffer,
tileBorderSegments,
gl::LineStrip { 4.0f * frame.pixelRatio });
}
}
void Painter::renderTileDebug(const RenderTile& tile) {
MBGL_DEBUG_GROUP(std::string { "debug " } + util::toString(tile.id));
if (frame.debugOptions != MapDebugOptions::NoDebug) {
setClipping(tile.clip);
if (frame.debugOptions & (MapDebugOptions::Timestamps | MapDebugOptions::ParseStatus)) {
renderDebugText(tile.tile, tile.matrix);
}
if (frame.debugOptions & MapDebugOptions::TileBorders) {
renderDebugFrame(tile.matrix);
}
}
}
void Painter::renderDebugFrame(const mat4 &matrix) {
MBGL_DEBUG_GROUP("debug frame");
// Disable depth test and don't count this towards the depth buffer,
// but *don't* disable stencil test, as we want to clip the red tile border
// to the tile viewport.
config.depthTest = GL_FALSE;
config.stencilOp.reset();
config.stencilTest = GL_TRUE;
auto& plainShader = *shader.plain;
config.program = plainShader.getID();
plainShader.u_matrix = matrix;
plainShader.u_opacity = 1.0f;
// draw tile outline
tileBorderArray.bind(plainShader, tileBorderBuffer, BUFFER_OFFSET_0, store);
plainShader.u_color = { 1.0f, 0.0f, 0.0f, 1.0f };
config.lineWidth = 4.0f * frame.pixelRatio;
MBGL_CHECK_ERROR(glDrawArrays(GL_LINE_STRIP, 0, (GLsizei)tileBorderBuffer.index()));
}
void Painter::renderDebugText(Tile& tile, const mat4 &matrix) {
MBGL_DEBUG_GROUP("debug text");
config.depthTest = GL_FALSE;
if (!tile.debugBucket || tile.debugBucket->renderable != tile.isRenderable() ||
tile.debugBucket->complete != tile.isComplete() ||
!(tile.debugBucket->modified == tile.modified) ||
!(tile.debugBucket->expires == tile.expires) ||
tile.debugBucket->debugMode != frame.debugOptions) {
tile.debugBucket = std::make_unique<DebugBucket>(
tile.id, tile.isRenderable(), tile.isComplete(), tile.modified,
tile.expires, frame.debugOptions);
}
auto& plainShader = *shader.plain;
config.program = plainShader.getID();
plainShader.u_matrix = matrix;
plainShader.u_opacity = 1.0f;
// Draw white outline
plainShader.u_color = Color::white();
config.lineWidth = 4.0f * frame.pixelRatio;
tile.debugBucket->drawLines(plainShader, store);
#ifndef GL_ES_VERSION_2_0
// Draw line "end caps"
MBGL_CHECK_ERROR(glPointSize(2));
tile.debugBucket->drawPoints(plainShader, store);
#endif
// Draw black text.
plainShader.u_color = Color::black();
config.lineWidth = 2.0f * frame.pixelRatio;
tile.debugBucket->drawLines(plainShader, store);
config.depthFunc.reset();
config.depthTest = GL_TRUE;
}