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#include <mbgl/renderer/painter.hpp>
#include <mbgl/renderer/paint_parameters.hpp>
#include <mbgl/gl/gl.hpp>
#include <mbgl/style/source.hpp>
#include <mbgl/shader/shaders.hpp>
#include <mbgl/util/clip_id.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/gl/debugging.hpp>
namespace mbgl {
void Painter::drawClippingMasks(PaintParameters& parameters, const std::map<UnwrappedTileID, ClipID>& stencils) {
MBGL_DEBUG_GROUP("clipping masks");
auto& plainShader = parameters.shaders.fill;
auto& arrayCoveringPlain = parameters.shaders.coveringPlainArray;
mat4 matrix;
const GLuint mask = 0b11111111;
context.program = plainShader.getID();
context.stencilOp = { gl::StencilTestOperation::Keep, gl::StencilTestOperation::Keep,
gl::StencilTestOperation::Replace };
context.stencilTest = true;
context.depthTest = false;
context.depthMask = false;
context.colorMask = { false, false, false, false };
context.stencilMask = mask;
arrayCoveringPlain.bind(plainShader, tileTriangleVertexBuffer, BUFFER_OFFSET_0, context);
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());
context.stencilFunc = { gl::StencilTestFunction::Always, ref, mask };
MBGL_CHECK_ERROR(glDrawArrays(GL_TRIANGLES, 0, static_cast<GLsizei>(tileTriangleVertexBuffer.vertexCount)));
}
}
} // namespace mbgl
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