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#include <mbgl/renderer/painter.hpp>
#include <mbgl/style/style_properties.hpp>
#include <mbgl/renderer/prerendered_texture.hpp>
#include <mbgl/renderer/raster_bucket.hpp>
using namespace mbgl;
void Painter::preparePrerender(RasterBucket &bucket) {
glDisable(GL_DEPTH_TEST);
glDisable(GL_STENCIL_TEST);
// Render the actual tile.
#if GL_EXT_discard_framebuffer
const GLenum discards[] = {GL_COLOR_ATTACHMENT0};
glDiscardFramebufferEXT(GL_FRAMEBUFFER, 1, discards);
#endif
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glViewport(0, 0, bucket.properties.size, bucket.properties.size);
}
void Painter::renderPrerenderedTexture(RasterBucket &bucket, const mat4 &matrix, const RasterProperties& properties) {
const int buffer = bucket.properties.buffer * 4096.0f;
// draw the texture on a quad
useProgram(rasterShader->program);
rasterShader->u_matrix = matrix;
rasterShader->u_opacity = 1;
depthRange(strata, 1.0f);
glActiveTexture(GL_TEXTURE0);
rasterShader->u_image = 0;
rasterShader->u_buffer = buffer;
rasterShader->u_opacity = properties.opacity;
rasterShader->u_brightness_low = properties.brightness[0];
rasterShader->u_brightness_high = properties.brightness[1];
rasterShader->u_saturation_factor = saturationFactor(properties.saturation);
rasterShader->u_contrast_factor = contrastFactor(properties.contrast);
rasterShader->u_spin_weights = spinWeights(properties.hue_rotate);
bucket.texture.bindTexture();
coveringRasterArray.bind(*rasterShader, tileStencilBuffer, BUFFER_OFFSET(0));
glDrawArrays(GL_TRIANGLES, 0, (GLsizei)tileStencilBuffer.index());
}
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