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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/shader/shaders.hpp>
#include <mbgl/shader/fill_uniforms.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/gl/debugging.hpp>
#include <mbgl/gl/gl.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(),
shaders->fill,
FillColorUniforms::values(
renderTile.matrix,
1.0f,
color,
color,
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
// When reading data from the framebuffer, make sure that we are storing the depth values
// tightly packed into the buffer to avoid buffer overruns. Also see unpacking adjustment below.
context.pixelStorePack = { 1 };
// Read the stencil buffer
const auto viewport = context.viewport.getCurrentValue();
auto pixels = std::make_unique<uint8_t[]>(viewport.size.width * viewport.size.height);
MBGL_CHECK_ERROR(glReadPixels(
viewport.x, // GLint x
viewport.y, // GLint y
viewport.size.width, // GLsizei width
viewport.size.height, // GLsizei height
GL_STENCIL_INDEX, // GLenum format
GL_UNSIGNED_BYTE, // GLenum type
pixels.get() // GLvoid * data
));
// Scale the Stencil buffer to cover the entire color space.
auto it = pixels.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.pixelStoreUnpack = { 1 };
MBGL_CHECK_ERROR(glDrawPixels(viewport.size.width, viewport.size.height, GL_LUMINANCE,
GL_UNSIGNED_BYTE, pixels.get()));
#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
// When reading data from the framebuffer, make sure that we are storing the depth values
// tightly packed into the buffer to avoid buffer overruns. Also see unpacking adjustment below.
context.pixelStorePack = { 1 };
// Scales the values in the depth buffer so that they cover the entire grayscale range. This
// makes it easier to spot tiny differences.
const double base = 1.0 / (1.0 - depthRangeSize);
MBGL_CHECK_ERROR(glPixelTransferf(GL_DEPTH_SCALE, base));
MBGL_CHECK_ERROR(glPixelTransferf(GL_DEPTH_BIAS, 1.0 - base));
// Read the stencil buffer
auto viewport = context.viewport.getCurrentValue();
auto pixels = std::make_unique<uint8_t[]>(viewport.size.width * viewport.size.height);
MBGL_CHECK_ERROR(glReadPixels(
viewport.x, // GLint x
viewport.y, // GLint y
viewport.size.width, // GLsizei width
viewport.size.height, // GLsizei height
GL_DEPTH_COMPONENT, // GLenum format
GL_UNSIGNED_BYTE, // GLenum type
pixels.get() // GLvoid * data
));
context.pixelZoom = { 1, 1 };
context.rasterPos = { -1, -1, 0, 1 };
context.pixelStoreUnpack = { 1 };
MBGL_CHECK_ERROR(glDrawPixels(viewport.size.width, viewport.size.height, GL_LUMINANCE,
GL_UNSIGNED_BYTE, pixels.get()));
#endif // MBGL_USE_GLES2
}
#endif // NDEBUG
} // namespace mbgl
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