43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
#include <mbgl/renderer/painter.hpp>
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#include <mbgl/map/source.hpp>
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#include <mbgl/shader/plain_shader.hpp>
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#include <mbgl/util/clip_id.hpp>
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#ifndef BUFFER_OFFSET
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#define BUFFER_OFFSET(i) ((char *)nullptr + (i))
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#endif
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using namespace mbgl;
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void Painter::drawClippingMasks(const std::set<Source*>& sources) {
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gl::group group("clipping masks");
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useProgram(plainShader->program);
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MBGL_CHECK_ERROR(glDisable(GL_DEPTH_TEST));
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depthMask(false);
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MBGL_CHECK_ERROR(glColorMask(false, false, false, false));
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depthRange(1.0f, 1.0f);
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coveringPlainArray.bind(*plainShader, tileStencilBuffer, BUFFER_OFFSET(0));
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for (const auto& source : sources) {
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source->drawClippingMasks(*this);
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}
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MBGL_CHECK_ERROR(glEnable(GL_DEPTH_TEST));
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MBGL_CHECK_ERROR(glColorMask(true, true, true, true));
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depthMask(true);
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MBGL_CHECK_ERROR(glStencilMask(0x0));
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}
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void Painter::drawClippingMask(const mat4& matrix, const ClipID &clip) {
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plainShader->u_matrix = matrix;
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const GLint ref = (GLint)(clip.reference.to_ulong());
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const GLuint mask = (GLuint)(clip.mask.to_ulong());
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MBGL_CHECK_ERROR(glStencilFunc(GL_ALWAYS, ref, mask));
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MBGL_CHECK_ERROR(glStencilMask(mask));
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MBGL_CHECK_ERROR(glDrawArrays(GL_TRIANGLES, 0, (GLsizei)tileStencilBuffer.index()));
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}
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