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#include <mbgl/renderer/painter.hpp>
#include <mbgl/renderer/fill_bucket.hpp>
#include <mbgl/style/style.hpp>
#include <mbgl/style/style_layer.hpp>
#include <mbgl/map/map.hpp>
#include <mbgl/map/sprite.hpp>
#include <mbgl/geometry/sprite_atlas.hpp>
#include <mbgl/util/std.hpp>
#include <mbgl/util/mat3.hpp>
using namespace mbgl;
void Painter::renderFill(FillBucket& bucket, const FillProperties& properties, const Tile::ID& id, const mat4 &vtxMatrix) {
Color fill_color = properties.fill_color;
fill_color[0] *= properties.opacity;
fill_color[1] *= properties.opacity;
fill_color[2] *= properties.opacity;
fill_color[3] *= properties.opacity;
Color stroke_color = properties.stroke_color;
if (stroke_color[3] < 0) {
stroke_color = fill_color;
} else {
stroke_color[0] *= properties.opacity;
stroke_color[1] *= properties.opacity;
stroke_color[2] *= properties.opacity;
stroke_color[3] *= properties.opacity;
}
const bool pattern = properties.image.size();
bool outline = properties.antialias && !pattern && properties.stroke_color != properties.fill_color;
bool fringeline = properties.antialias && !pattern && properties.stroke_color == properties.fill_color;
// Because we're drawing top-to-bottom, and we update the stencil mask
// below, we have to draw the outline first (!)
if (outline && pass == RenderPass::Translucent) {
useProgram(outlineShader->program);
outlineShader->setMatrix(vtxMatrix);
lineWidth(2.0f); // This is always fixed and does not depend on the pixelRatio!
outlineShader->setColor(stroke_color);
// Draw the entire line
outlineShader->setWorld({{
static_cast<float>(map.getState().getFramebufferWidth()),
static_cast<float>(map.getState().getFramebufferHeight())
}});
depthRange(strata, 1.0f);
bucket.drawVertices(*outlineShader);
}
if (pattern) {
// Image fill.
Sprite &sprite = *map.getSprite();
if (pass == RenderPass::Translucent && sprite) {
SpriteAtlas &spriteAtlas = *map.getSpriteAtlas();
const Rect<uint16_t> pos = spriteAtlas.getImage(properties.image, sprite);
// `repeating` indicates that the image will be used in a repeating pattern
// repeating pattern images are assumed to have a 1px padding that mirrors the opposite edge
// positions for repeating images are adjusted to exclude the edge
const int repeating = 1;
const std::array<float, 2> size {{
float(pos.w) / spriteAtlas.getPixelRatio(),
float(pos.h) / spriteAtlas.getPixelRatio(),
}};
const std::array<float, 2> tl {{
(float(pos.x + repeating) / spriteAtlas.getWidth()),
(float(pos.y + repeating) / spriteAtlas.getHeight()),
}};
const std::array<float, 2> br {{
(float(pos.x + pos.w - 2 * repeating) / spriteAtlas.getWidth()),
(float(pos.y + pos.h - 2 * repeating) / spriteAtlas.getHeight()),
}};
const float mix = std::fmod(float(map.getState().getZoom()), 1.0f);
const float factor = 8.0 / std::pow(2, map.getState().getIntegerZoom() - id.z);
mat3 patternMatrix;
matrix::identity(patternMatrix);
matrix::scale(patternMatrix, patternMatrix, 1.0f / (size[0] * factor), 1.0f / (size[1] * factor));
useProgram(patternShader->program);
patternShader->setMatrix(vtxMatrix);
patternShader->setPatternTopLeft(tl);
patternShader->setPatternBottomRight(br);
patternShader->setOpacity(properties.opacity);
patternShader->setImage(0);
patternShader->setMix(mix);
patternShader->setPatternMatrix(patternMatrix);
glActiveTexture(GL_TEXTURE0);
spriteAtlas.bind(true);
// Draw the actual triangles into the color & stencil buffer.
depthRange(strata, 1.0f);
bucket.drawElements(*patternShader);
}
}
else {
// No image fill.
if ((fill_color[3] >= 1.0f) == (pass == RenderPass::Opaque)) {
// Only draw the fill when it's either opaque and we're drawing opaque
// fragments or when it's translucent and we're drawing translucent
// fragments
// Draw filling rectangle.
useProgram(plainShader->program);
plainShader->setMatrix(vtxMatrix);
plainShader->setColor(fill_color);
// Draw the actual triangles into the color & stencil buffer.
depthRange(strata + strata_epsilon, 1.0f);
bucket.drawElements(*plainShader);
}
}
// Because we're drawing top-to-bottom, and we update the stencil mask
// below, we have to draw the outline first (!)
if (fringeline && pass == RenderPass::Translucent) {
useProgram(outlineShader->program);
outlineShader->setMatrix(vtxMatrix);
lineWidth(2.0f); // This is always fixed and does not depend on the pixelRatio!
outlineShader->setColor(fill_color);
// Draw the entire line
outlineShader->setWorld({{
static_cast<float>(map.getState().getFramebufferWidth()),
static_cast<float>(map.getState().getFramebufferHeight())
}});
depthRange(strata + strata_epsilon, 1.0f);
bucket.drawVertices(*outlineShader);
}
}
void Painter::renderFill(FillBucket& bucket, std::shared_ptr<StyleLayer> layer_desc, const Tile::ID& id, const mat4 &matrix) {
// Abort early.
if (!bucket.hasData()) return;
const FillProperties &properties = layer_desc->getProperties<FillProperties>();
const mat4 &vtxMatrix = translatedMatrix(matrix, properties.translate, id, properties.translateAnchor);
renderFill(bucket, properties, id, vtxMatrix);
}
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