diff options
Diffstat (limited to 'src/mbgl/programs/background_program.cpp')
-rw-r--r-- | src/mbgl/programs/background_program.cpp | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/mbgl/programs/background_program.cpp b/src/mbgl/programs/background_program.cpp new file mode 100644 index 0000000000..52a9638d6b --- /dev/null +++ b/src/mbgl/programs/background_program.cpp @@ -0,0 +1,47 @@ +#include <mbgl/programs/background_program.hpp> +#include <mbgl/renderer/image_atlas.hpp> +#include <mbgl/renderer/cross_faded_property_evaluator.hpp> +#include <mbgl/tile/tile_id.hpp> +#include <mbgl/map/transform_state.hpp> + +namespace mbgl { + +using namespace style; + +static_assert(sizeof(BackgroundLayoutVertex) == 4, "expected BackgroundLayoutVertex size"); + +BackgroundPatternUniforms::Values +BackgroundPatternUniforms::values(mat4 matrix, + float opacity, + Size atlasSize, + const ImagePosition& a, + const ImagePosition& b, + const Faded<std::string>& fading, + const UnwrappedTileID& tileID, + const TransformState& state) +{ + int32_t tileSizeAtNearestZoom = util::tileSize * state.zoomScale(state.getIntegerZoom() - tileID.canonical.z); + int32_t pixelX = tileSizeAtNearestZoom * (tileID.canonical.x + tileID.wrap * state.zoomScale(tileID.canonical.z)); + int32_t pixelY = tileSizeAtNearestZoom * tileID.canonical.y; + + return BackgroundPatternUniforms::Values { + uniforms::u_matrix::Value{ matrix }, + uniforms::u_opacity::Value{ opacity }, + uniforms::u_texsize::Value{ atlasSize }, + uniforms::u_pattern_tl_a::Value{ a.tl() }, + uniforms::u_pattern_br_a::Value{ a.br() }, + uniforms::u_pattern_tl_b::Value{ b.tl() }, + uniforms::u_pattern_br_b::Value{ b.br() }, + uniforms::u_pattern_size_a::Value{ a.displaySize() }, + uniforms::u_pattern_size_b::Value{ b.displaySize() }, + uniforms::u_scale_a::Value{ fading.fromScale }, + uniforms::u_scale_b::Value{ fading.toScale }, + uniforms::u_mix::Value{ fading.t }, + uniforms::u_image::Value{ 0 }, + uniforms::u_pixel_coord_upper::Value{ std::array<float, 2> {{ float(pixelX >> 16), float(pixelY >> 16) }} }, + uniforms::u_pixel_coord_lower::Value{ std::array<float, 2> {{ float(pixelX & 0xFFFF), float(pixelY & 0xFFFF) }} }, + uniforms::u_tile_units_to_pixels::Value{ 1.0f / tileID.pixelsToTileUnits(1.0f, state.getIntegerZoom()) }, + }; +} + +} // namespace mbgl |