48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
#include <llmr/renderer/painter.hpp>
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using namespace llmr;
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void Painter::preparePrerender(const GenericProperties &properties) {
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glDisable(GL_DEPTH_TEST);
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glDisable(GL_STENCIL_TEST);
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// Render the actual tile.
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#if GL_EXT_discard_framebuffer
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const GLenum discards[] = {GL_COLOR_ATTACHMENT0};
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glDiscardFramebufferEXT(GL_FRAMEBUFFER, 1, discards);
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#endif
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glClear(GL_COLOR_BUFFER_BIT);
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glViewport(0, 0, properties.prerenderSize, properties.prerenderSize);
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}
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void Painter::finishPrerender(const GenericProperties &properties) {
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_STENCIL_TEST);
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glViewport(0, 0, gl_viewport[0], gl_viewport[1]);
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}
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void Painter::renderPrerenderedTexture(Bucket &bucket, const GenericProperties &properties) {
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const int buffer = 4096 * properties.prerenderBuffer;
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// draw the texture on a quad
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depthMask(false);
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useProgram(rasterShader->program);
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rasterShader->setMatrix(matrix);
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rasterShader->setOpacity(1);
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glDepthRange(strata, 1.0f);
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glActiveTexture(GL_TEXTURE0);
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rasterShader->setImage(0);
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rasterShader->setBuffer(buffer);
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rasterShader->setOpacity(properties.opacity);
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bucket.prerendered->bindTexture();
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coveringRasterArray.bind(*rasterShader, tileStencilBuffer, BUFFER_OFFSET(0));
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glDrawArrays(GL_TRIANGLES, 0, (GLsizei)tileStencilBuffer.index());
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depthMask(true);
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}
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