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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/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& tile) {
MBGL_DEBUG_GROUP(std::string { "debug " } + util::toString(tile.id));
if (frame.debugOptions != MapDebugOptions::NoDebug) {
setClipping(tile.clip);
if (frame.debugOptions & (MapDebugOptions::Timestamps | MapDebugOptions::ParseStatus)) {
renderDebugText(tile.tile, tile.matrix);
}
if (frame.debugOptions & MapDebugOptions::TileBorders) {
renderDebugFrame(tile.matrix);
}
}
}
void Painter::renderDebugText(Tile& tile, const mat4 &matrix) {
MBGL_DEBUG_GROUP("debug text");
context.depthTest = false;
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);
}
auto& plainShader = shaders->fill;
context.program = plainShader.getID();
plainShader.u_matrix = matrix;
plainShader.u_opacity = 1.0f;
// Draw white outline
plainShader.u_color = Color::white();
context.lineWidth = 4.0f * frame.pixelRatio;
tile.debugBucket->drawLines(plainShader, context);
#if not MBGL_USE_GLES2
// Draw line "end caps"
MBGL_CHECK_ERROR(glPointSize(2));
tile.debugBucket->drawPoints(plainShader, context);
#endif // MBGL_USE_GLES2
// Draw black text.
plainShader.u_color = Color::black();
context.lineWidth = 2.0f * frame.pixelRatio;
tile.debugBucket->drawLines(plainShader, context);
context.depthFunc = gl::DepthTestFunction::LessEqual;
context.depthTest = true;
}
void Painter::renderDebugFrame(const mat4 &matrix) {
MBGL_DEBUG_GROUP("debug frame");
// Disable depth test and don't count this towards the depth buffer,
// but *don't* disable stencil test, as we want to clip the red tile border
// to the tile viewport.
context.depthTest = false;
context.stencilOp = { gl::StencilTestOperation::Keep, gl::StencilTestOperation::Keep,
gl::StencilTestOperation::Replace };
context.stencilTest = true;
auto& plainShader = shaders->fill;
context.program = plainShader.getID();
plainShader.u_matrix = matrix;
plainShader.u_opacity = 1.0f;
// draw tile outline
tileBorderArray.bind(plainShader, tileLineStripVertexBuffer, BUFFER_OFFSET_0, context);
plainShader.u_color = { 1.0f, 0.0f, 0.0f, 1.0f };
context.lineWidth = 4.0f * frame.pixelRatio;
MBGL_CHECK_ERROR(glDrawArrays(GL_LINE_STRIP, 0,
static_cast<GLsizei>(tileLineStripVertexBuffer.vertexCount)));
}
#ifndef NDEBUG
void Painter::renderClipMasks(PaintParameters&) {
context.stencilTest = false;
context.depthTest = false;
context.program = 0;
context.colorMask = { true, true, true, true };
#if not MBGL_USE_GLES2
context.pixelZoom = { 1, 1 };
context.rasterPos = { -1, -1, 0, 0 };
// 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;
}
MBGL_CHECK_ERROR(glWindowPos2i(viewport.x, viewport.y));
MBGL_CHECK_ERROR(glDrawPixels(viewport.size.width, viewport.size.height, GL_LUMINANCE,
GL_UNSIGNED_BYTE, pixels.get()));
#endif // MBGL_USE_GLES2
}
#endif // NDEBUG
#ifndef NDEBUG
void Painter::renderDepthBuffer(PaintParameters&) {
context.stencilTest = false;
context.depthTest = false;
context.program = 0;
context.colorMask = { true, true, true, true };
#if not MBGL_USE_GLES2
context.pixelZoom = { 1, 1 };
context.rasterPos = { -1, -1, 0, 0 };
// Read the stencil buffer
const auto viewport = context.viewport.getCurrentValue();
auto pixels = std::make_unique<uint8_t[]>(viewport.size.width * viewport.size.height);
const double base = 1.0 / (1.0 - depthRangeSize);
glPixelTransferf(GL_DEPTH_SCALE, base);
glPixelTransferf(GL_DEPTH_BIAS, 1.0 - base);
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
));
MBGL_CHECK_ERROR(glWindowPos2i(viewport.x, viewport.y));
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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