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#include <mbgl/renderer/painter.hpp>
#include <mbgl/renderer/debug_bucket.hpp>
#include <mbgl/renderer/render_tile.hpp>
#include <mbgl/renderer/paint_parameters.hpp>
#include <mbgl/map/view.hpp>
#include <mbgl/tile/tile.hpp>
#include <mbgl/programs/programs.hpp>
#include <mbgl/programs/fill_program.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/gl/debugging.hpp>
#include <mbgl/util/color.hpp>
namespace mbgl {
void Painter::renderTileDebug(const RenderTile& renderTile) {
if (frame.debugOptions == MapDebugOptions::NoDebug)
return;
MBGL_DEBUG_GROUP(std::string { "debug " } + util::toString(renderTile.id));
auto draw = [&] (Color color, auto subject) {
context.draw({
gl::DepthMode::disabled(),
stencilModeForClipping(renderTile.clip),
gl::ColorMode::unblended(),
programs->fill,
FillProgram::UniformValues {
uniforms::u_matrix::Value{ renderTile.matrix },
uniforms::u_opacity::Value{ 1.0f },
uniforms::u_color::Value{ color },
uniforms::u_outline_color::Value{ color },
uniforms::u_world::Value{ context.viewport.getCurrentValue().size },
},
subject
});
};
if (frame.debugOptions & (MapDebugOptions::Timestamps | MapDebugOptions::ParseStatus)) {
Tile& tile = renderTile.tile;
if (!tile.debugBucket || tile.debugBucket->renderable != tile.isRenderable() ||
tile.debugBucket->complete != tile.isComplete() ||
!(tile.debugBucket->modified == tile.modified) ||
!(tile.debugBucket->expires == tile.expires) ||
tile.debugBucket->debugMode != frame.debugOptions) {
tile.debugBucket = std::make_unique<DebugBucket>(
tile.id, tile.isRenderable(), tile.isComplete(), tile.modified,
tile.expires, frame.debugOptions, context);
}
const auto& vertexBuffer = tile.debugBucket->vertexBuffer;
draw(Color::white(), gl::Unindexed<gl::Lines>(vertexBuffer, 4.0f * frame.pixelRatio));
draw(Color::black(), gl::Unindexed<gl::Points>(vertexBuffer, 2.0f));
draw(Color::black(), gl::Unindexed<gl::Lines>(vertexBuffer, 2.0f * frame.pixelRatio));
}
if (frame.debugOptions & MapDebugOptions::TileBorders) {
draw(Color::red(), gl::Unindexed<gl::LineStrip>(tileLineStripVertexBuffer, 4.0f * frame.pixelRatio));
}
}
#ifndef NDEBUG
void Painter::renderClipMasks(PaintParameters&) {
context.setStencilMode(gl::StencilMode::disabled());
context.setDepthMode(gl::DepthMode::disabled());
context.setColorMode(gl::ColorMode::unblended());
context.program = 0;
#if not MBGL_USE_GLES2
// Reset the value in case someone else changed it, or it's dirty.
context.pixelTransferStencil = gl::value::PixelTransferStencil::Default;
// Read the stencil buffer
const auto viewport = context.viewport.getCurrentValue();
auto image =
context.readFramebuffer<AlphaImage, gl::TextureFormat::Stencil>(viewport.size, false);
// Scale the Stencil buffer to cover the entire color space.
auto it = image.data.get();
auto end = it + viewport.size.width * viewport.size.height;
const auto factor = 255.0f / *std::max_element(it, end);
for (; it != end; ++it) {
*it *= factor;
}
context.pixelZoom = { 1, 1 };
context.rasterPos = { -1, -1, 0, 1 };
context.drawPixels(image);
#endif // MBGL_USE_GLES2
}
void Painter::renderDepthBuffer(PaintParameters&) {
context.setStencilMode(gl::StencilMode::disabled());
context.setDepthMode(gl::DepthMode::disabled());
context.setColorMode(gl::ColorMode::unblended());
context.program = 0;
#if not MBGL_USE_GLES2
// Scales the values in the depth buffer so that they cover the entire grayscale range. This
// makes it easier to spot tiny differences.
const float base = 1.0f / (1.0f - depthRangeSize);
context.pixelTransferDepth = { base, 1.0f - base };
// Read the stencil buffer
auto viewport = context.viewport.getCurrentValue();
auto image =
context.readFramebuffer<AlphaImage, gl::TextureFormat::Depth>(viewport.size, false);
context.pixelZoom = { 1, 1 };
context.rasterPos = { -1, -1, 0, 1 };
context.drawPixels(image);
#endif // MBGL_USE_GLES2
}
#endif // NDEBUG
} // namespace mbgl
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