mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-05-12 09:56:45 +02:00
00181dcf50
Bitmap export is pixel conversion, not an ImmutableBitmap-specific operation. It needs a source bitmap and color space, and callers should provide those explicitly instead of routing through the immutable snapshot abstraction. Move the export formats, flags, result type, and conversion implementation into a new BitmapExport helper. Keep BitmapExportResult.h as a forwarding header for existing includes while making BitmapExport.h the new home for the public API. Update WebGL and the LibGfx export test to use the standalone helper directly.
429 lines
21 KiB
C++
429 lines
21 KiB
C++
/*
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* Copyright (c) 2024-2025, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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* Copyright (c) 2024-2025, Luke Wilde <luke@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#define GL_GLEXT_PROTOTYPES 1
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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extern "C" {
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#include <GLES2/gl2ext_angle.h>
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}
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#include <LibGfx/BitmapExport.h>
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#include <LibGfx/ImmutableBitmap.h>
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#include <LibGfx/SkiaUtils.h>
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#include <LibWeb/HTML/EventLoop/Task.h>
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#include <LibWeb/HTML/HTMLCanvasElement.h>
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#include <LibWeb/HTML/HTMLImageElement.h>
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#include <LibWeb/HTML/HTMLVideoElement.h>
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#include <LibWeb/HTML/ImageBitmap.h>
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#include <LibWeb/HTML/ImageData.h>
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#include <LibWeb/HTML/Scripting/TemporaryExecutionContext.h>
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#include <LibWeb/HTML/UniversalGlobalScope.h>
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#include <LibWeb/Platform/EventLoopPlugin.h>
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#include <LibWeb/WebGL/Extensions/ANGLEInstancedArrays.h>
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#include <LibWeb/WebGL/Extensions/EXTBlendMinMax.h>
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#include <LibWeb/WebGL/Extensions/EXTColorBufferFloat.h>
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#include <LibWeb/WebGL/Extensions/EXTRenderSnorm.h>
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#include <LibWeb/WebGL/Extensions/EXTTextureFilterAnisotropic.h>
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#include <LibWeb/WebGL/Extensions/EXTTextureNorm16.h>
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#include <LibWeb/WebGL/Extensions/OESElementIndexUint.h>
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#include <LibWeb/WebGL/Extensions/OESStandardDerivatives.h>
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#include <LibWeb/WebGL/Extensions/OESVertexArrayObject.h>
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#include <LibWeb/WebGL/Extensions/WebGLCompressedTextureS3tc.h>
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#include <LibWeb/WebGL/Extensions/WebGLCompressedTextureS3tcSrgb.h>
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#include <LibWeb/WebGL/Extensions/WebGLDebugRendererInfo.h>
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#include <LibWeb/WebGL/Extensions/WebGLDrawBuffers.h>
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#include <LibWeb/WebGL/OpenGLContext.h>
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#include <LibWeb/WebGL/WebGLRenderingContextBase.h>
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#include <core/SkCanvas.h>
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#include <core/SkColorSpace.h>
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#include <core/SkColorType.h>
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#include <core/SkImage.h>
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#include <core/SkPixmap.h>
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#include <core/SkSurface.h>
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namespace Web::WebGL {
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static constexpr Optional<Gfx::ExportFormat> determine_export_format(WebIDL::UnsignedLong format, WebIDL::UnsignedLong type)
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{
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switch (format) {
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case GL_RGB:
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switch (type) {
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case GL_UNSIGNED_BYTE:
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return Gfx::ExportFormat::RGB888;
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case GL_UNSIGNED_SHORT_5_6_5:
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return Gfx::ExportFormat::RGB565;
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default:
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break;
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}
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break;
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case GL_RGBA:
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switch (type) {
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case GL_UNSIGNED_BYTE:
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return Gfx::ExportFormat::RGBA8888;
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case GL_UNSIGNED_SHORT_4_4_4_4:
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// FIXME: This is not exactly the same as RGBA.
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return Gfx::ExportFormat::RGBA4444;
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case GL_UNSIGNED_SHORT_5_5_5_1:
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return Gfx::ExportFormat::RGBA5551;
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break;
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default:
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break;
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}
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break;
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case GL_ALPHA:
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switch (type) {
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case GL_UNSIGNED_BYTE:
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return Gfx::ExportFormat::Alpha8;
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default:
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break;
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}
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break;
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case GL_LUMINANCE:
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switch (type) {
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case GL_UNSIGNED_BYTE:
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return Gfx::ExportFormat::Gray8;
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default:
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break;
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}
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break;
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default:
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break;
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}
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dbgln("WebGL: Unsupported format and type combination. format: 0x{:04x}, type: 0x{:04x}", format, type);
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return {};
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}
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WebGLRenderingContextBase::WebGLRenderingContextBase(JS::Realm& realm)
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: Bindings::PlatformObject(realm)
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{
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}
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struct Extension {
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Vector<StringView> required_angle_extensions;
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JS::ThrowCompletionOr<GC::Ref<JS::Object>> (*factory)(JS::Realm&, GC::Ref<WebGLRenderingContextBase>);
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Optional<OpenGLContext::WebGLVersion> only_for_webgl_version { OptionalNone {} };
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};
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static HashMap<String, Extension, AK::ASCIICaseInsensitiveStringTraits> s_available_webgl_extensions {
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// Khronos ratified WebGL Extensions
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{ "ANGLE_instanced_arrays"_string, { { "GL_ANGLE_instanced_arrays"sv }, ANGLEInstancedArrays::create, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "EXT_blend_minmax"_string, { { "GL_EXT_blend_minmax"sv }, EXTBlendMinMax::create, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "EXT_frag_depth"_string, { { "GL_EXT_frag_depth"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "EXT_shader_texture_lod"_string, { { "GL_EXT_shader_texture_lod"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "EXT_texture_filter_anisotropic"_string, { { "GL_EXT_texture_filter_anisotropic"sv }, EXTTextureFilterAnisotropic::create } },
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{ "OES_element_index_uint"_string, { { "GL_OES_element_index_uint"sv }, OESElementIndexUint::create, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "OES_standard_derivatives"_string, { { "GL_OES_standard_derivatives"sv }, OESStandardDerivatives::create, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "OES_texture_float"_string, { { "GL_OES_texture_float"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "OES_texture_float_linear"_string, { { "GL_OES_texture_float_linear"sv }, nullptr } },
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{ "OES_texture_half_float"_string, { { "GL_OES_texture_half_float"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "OES_texture_half_float_linear"_string, { { "GL_OES_texture_half_float_linear"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "OES_vertex_array_object"_string, { { "GL_OES_vertex_array_object"sv }, OESVertexArrayObject::create, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "WEBGL_compressed_texture_s3tc"_string, { { "GL_EXT_texture_compression_dxt1"sv, "GL_ANGLE_texture_compression_dxt3"sv, "GL_ANGLE_texture_compression_dxt5"sv }, WebGLCompressedTextureS3tc::create } },
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{ "WEBGL_debug_renderer_info"_string, { {}, WebGLDebugRendererInfo::create } },
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{ "WEBGL_debug_shaders"_string, { {}, nullptr } },
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{ "WEBGL_depth_texture"_string, { { "GL_ANGLE_depth_texture"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "WEBGL_draw_buffers"_string, { { "GL_EXT_draw_buffers"sv }, WebGLDrawBuffers::create, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "WEBGL_lose_context"_string, { {}, nullptr } },
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// Community approved WebGL Extensions
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{ "EXT_clip_control"_string, { { "GL_EXT_clip_control"sv }, nullptr } },
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{ "EXT_color_buffer_float"_string, { { "GL_EXT_color_buffer_float"sv }, EXTColorBufferFloat::create, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "EXT_color_buffer_half_float"_string, { { "GL_EXT_color_buffer_half_float"sv }, nullptr } },
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{ "EXT_conservative_depth"_string, { { "GL_EXT_conservative_depth"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "EXT_depth_clamp"_string, { { "GL_EXT_depth_clamp"sv }, nullptr } },
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{ "EXT_disjoint_timer_query"_string, { { "GL_EXT_disjoint_timer_query"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "EXT_disjoint_timer_query_webgl2"_string, { { "GL_EXT_disjoint_timer_query"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "EXT_float_blend"_string, { { "GL_EXT_float_blend"sv }, nullptr } },
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{ "EXT_polygon_offset_clamp"_string, { { "GL_EXT_polygon_offset_clamp"sv }, nullptr } },
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{ "EXT_render_snorm"_string, { { "GL_EXT_render_snorm"sv }, EXTRenderSnorm::create, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "EXT_sRGB"_string, { { "GL_EXT_sRGB"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "EXT_texture_compression_bptc"_string, { { "GL_EXT_texture_compression_bptc"sv }, nullptr } },
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{ "EXT_texture_compression_rgtc"_string, { { "GL_EXT_texture_compression_rgtc"sv }, nullptr } },
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{ "EXT_texture_mirror_clamp_to_edge"_string, { { "GL_EXT_texture_mirror_clamp_to_edge"sv }, nullptr } },
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{ "EXT_texture_norm16"_string, { { "GL_EXT_texture_norm16"sv }, EXTTextureNorm16::create, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "KHR_parallel_shader_compile"_string, { { "GL_KHR_parallel_shader_compile"sv }, nullptr } },
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{ "NV_shader_noperspective_interpolation"_string, { { "GL_NV_shader_noperspective_interpolation"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "OES_draw_buffers_indexed"_string, { { "GL_OES_draw_buffers_indexed"sv }, nullptr } },
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{ "OES_fbo_render_mipmap"_string, { { "GL_OES_fbo_render_mipmap"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "OES_sample_variables"_string, { { "GL_OES_sample_variables"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "OES_shader_multisample_interpolation"_string, { { "GL_OES_shader_multisample_interpolation"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "OVR_multiview2"_string, { { "GL_OVR_multiview2"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "WEBGL_blend_func_extended"_string, { { "GL_EXT_blend_func_extended"sv }, nullptr } },
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{ "WEBGL_clip_cull_distance"_string, { { "GL_EXT_clip_cull_distance"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "WEBGL_color_buffer_float"_string, { { "EXT_color_buffer_half_float"sv, "OES_texture_float"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL1 } },
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{ "WEBGL_compressed_texture_astc"_string, { { "KHR_texture_compression_astc_hdr"sv, "KHR_texture_compression_astc_ldr"sv }, nullptr } },
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{ "WEBGL_compressed_texture_etc"_string, { { "GL_ANGLE_compressed_texture_etc"sv }, nullptr } },
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{ "WEBGL_compressed_texture_etc1"_string, { { "GL_OES_compressed_ETC1_RGB8_texture"sv }, nullptr } },
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{ "WEBGL_compressed_texture_pvrtc"_string, { { "GL_IMG_texture_compression_pvrtc"sv }, nullptr } },
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{ "WEBGL_compressed_texture_s3tc_srgb"_string, { { "GL_EXT_texture_compression_s3tc_srgb"sv }, WebGLCompressedTextureS3tcSrgb::create } },
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{ "WEBGL_multi_draw"_string, { { "GL_ANGLE_multi_draw"sv }, nullptr } },
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{ "WEBGL_polygon_mode"_string, { { "GL_ANGLE_polygon_mode"sv }, nullptr } },
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{ "WEBGL_provoking_vertex"_string, { { "GL_ANGLE_provoking_vertex"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "WEBGL_render_shared_exponent"_string, { { "GL_QCOM_render_shared_exponent"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL2 } },
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{ "WEBGL_stencil_texturing"_string, { { "GL_ANGLE_stencil_texturing"sv }, nullptr, OpenGLContext::WebGLVersion::WebGL2 } },
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};
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Optional<Vector<String>> WebGLRenderingContextBase::get_supported_extensions()
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{
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auto opengl_extensions = context().get_supported_opengl_extensions();
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Vector<String> webgl_extensions;
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for (auto const& [available_extension_name, available_extension_info] : s_available_webgl_extensions) {
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bool supported = !available_extension_info.only_for_webgl_version.has_value()
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|| context().webgl_version() == available_extension_info.only_for_webgl_version;
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if (!available_extension_info.factory && !HTML::UniversalGlobalScopeMixin::expose_experimental_interfaces()) {
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supported = false;
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}
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if (supported) {
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for (auto const& required_extension : available_extension_info.required_angle_extensions) {
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if (!opengl_extensions.contains_slow(required_extension)) {
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supported = false;
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break;
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}
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}
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}
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if (supported)
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webgl_extensions.append(available_extension_name);
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}
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return webgl_extensions;
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}
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JS::Object* WebGLRenderingContextBase::get_extension(String const& name)
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{
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// Returns an object if, and only if, name is an ASCII case-insensitive match [HTML] for one of the names returned
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// from getSupportedExtensions; otherwise, returns null. The object returned from getExtension contains any constants
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// or functions provided by the extension. A returned object may have no constants or functions if the extension does
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// not define any, but a unique object must still be returned. That object is used to indicate that the extension has
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// been enabled.
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auto supported_extensions = get_supported_extensions();
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auto supported_extension_iterator = supported_extensions->find_if([&name](String const& supported_extension) {
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return supported_extension.equals_ignoring_ascii_case(name);
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});
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if (supported_extension_iterator == supported_extensions->end())
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return nullptr;
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auto maybe_extension = m_enabled_extensions.get(name);
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if (maybe_extension.has_value())
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return maybe_extension.release_value();
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// If we pass the check above this will always return a value
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auto const& extension_info = s_available_webgl_extensions.get(name).release_value();
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if (!extension_info.factory)
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return nullptr;
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for (auto const& required_extension : extension_info.required_angle_extensions) {
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context().request_extension(null_terminated_string(required_extension).data());
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}
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auto extension = MUST(extension_info.factory(realm(), *this));
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m_enabled_extensions.set(name, extension);
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return extension;
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}
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void WebGLRenderingContextBase::enable_compressed_texture_format(WebIDL::UnsignedLong format)
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{
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m_enabled_compressed_texture_formats.append(format);
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}
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void WebGLRenderingContextBase::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_enabled_extensions);
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}
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bool WebGLRenderingContextBase::extension_enabled(StringView extension) const
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{
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return m_enabled_extensions.contains(MUST(String::from_utf8(extension)));
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}
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ReadonlySpan<WebIDL::UnsignedLong> WebGLRenderingContextBase::enabled_compressed_texture_formats() const
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{
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return m_enabled_compressed_texture_formats;
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}
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Optional<Gfx::BitmapExportResult> WebGLRenderingContextBase::read_and_pixel_convert_texture_image_source(TexImageSource const& source, WebIDL::UnsignedLong format, WebIDL::UnsignedLong type, Optional<int> destination_width, Optional<int> destination_height)
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{
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// FIXME: If this function is called with an ImageData whose data attribute has been neutered,
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// an INVALID_VALUE error is generated.
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// FIXME: If this function is called with an ImageBitmap that has been neutered, an INVALID_VALUE
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// error is generated.
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// FIXME: If this function is called with an HTMLImageElement or HTMLVideoElement whose origin
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// differs from the origin of the containing Document, or with an HTMLCanvasElement,
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// ImageBitmap or OffscreenCanvas whose bitmap's origin-clean flag is set to false,
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// a SECURITY_ERR exception must be thrown. See Origin Restrictions.
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// FIXME: If source is null then an INVALID_VALUE error is generated.
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auto bitmap = source.visit(
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[](GC::Root<HTML::HTMLImageElement> const& source) -> RefPtr<Gfx::ImmutableBitmap> {
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return source->immutable_bitmap();
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},
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[](GC::Root<HTML::HTMLCanvasElement> const& source) -> RefPtr<Gfx::ImmutableBitmap> {
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auto surface = source->surface();
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if (!surface)
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return Gfx::ImmutableBitmap::create(*source->get_bitmap_from_surface());
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return Gfx::ImmutableBitmap::create_snapshot_from_painting_surface(*surface);
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},
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[](GC::Root<HTML::OffscreenCanvas> const& source) -> RefPtr<Gfx::ImmutableBitmap> {
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return Gfx::ImmutableBitmap::create(*source->bitmap());
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},
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[](GC::Root<HTML::HTMLVideoElement> const& source) -> RefPtr<Gfx::ImmutableBitmap> {
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return source->bitmap();
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},
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[](GC::Root<HTML::ImageBitmap> const& source) -> RefPtr<Gfx::ImmutableBitmap> {
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return Gfx::ImmutableBitmap::create(*source->bitmap());
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},
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[](GC::Root<HTML::ImageData> const& source) -> RefPtr<Gfx::ImmutableBitmap> {
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return Gfx::ImmutableBitmap::create(source->bitmap());
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});
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if (!bitmap)
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return OptionalNone {};
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auto export_format = determine_export_format(format, type);
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if (!export_format.has_value())
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return OptionalNone {};
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// FIXME: Respect unpackColorSpace
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auto export_flags = 0;
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if (m_unpack_flip_y && !source.has<GC::Root<HTML::ImageBitmap>>())
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// The first pixel transferred from the source to the WebGL implementation corresponds to the upper left corner of
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// the source. This behavior is modified by the UNPACK_FLIP_Y_WEBGL pixel storage parameter, except for ImageBitmap
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// arguments, as described in the abovementioned section.
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export_flags |= Gfx::ExportFlags::FlipY;
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if (m_unpack_premultiply_alpha)
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export_flags |= Gfx::ExportFlags::PremultiplyAlpha;
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auto source_bitmap = bitmap->bitmap();
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if (!source_bitmap)
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return OptionalNone {};
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auto result = Gfx::export_bitmap_to_byte_buffer(
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*source_bitmap,
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bitmap->color_space(),
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export_format.value(),
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export_flags,
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destination_width,
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destination_height);
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if (result.is_error()) {
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dbgln("Could not export bitmap: {}", result.release_error());
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return OptionalNone {};
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}
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return result.release_value();
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}
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// TODO: The glGetError spec allows for queueing errors which is something we should probably do, for now
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// this just keeps track of one error which is also fine by the spec
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GLenum WebGLRenderingContextBase::get_error_value()
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{
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if (m_error == GL_NO_ERROR)
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return glGetError();
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auto error = m_error;
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m_error = GL_NO_ERROR;
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return error;
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}
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void WebGLRenderingContextBase::set_error(GLenum error)
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{
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if (m_error != GL_NO_ERROR)
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return;
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auto context_error = glGetError();
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if (context_error != GL_NO_ERROR)
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m_error = context_error;
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else
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m_error = error;
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}
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bool WebGLRenderingContextBase::is_context_lost() const
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{
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dbgln_if(WEBGL_CONTEXT_DEBUG, "WebGLRenderingContext::is_context_lost()");
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return m_context_lost;
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}
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// https://immersive-web.github.io/webxr/#dom-webglrenderingcontextbase-makexrcompatible
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GC::Ref<WebIDL::Promise> WebGLRenderingContextBase::make_xr_compatible()
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{
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// 1. If the requesting document’s origin is not allowed to use the "xr-spatial-tracking" permissions policy,
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// resolve promise and return it.
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// FIXME: Implement this.
|
||
|
||
// 2. Let promise be a new Promise created in the Realm of this WebGLRenderingContextBase.
|
||
auto& realm = this->realm();
|
||
auto promise = WebIDL::create_promise(realm);
|
||
|
||
// 3. Let context be this.
|
||
auto context = this;
|
||
|
||
// 4. Run the following steps in parallel:
|
||
Platform::EventLoopPlugin::the().deferred_invoke(GC::create_function(realm.heap(), [&realm, context, promise]() {
|
||
// 1. Let device be the result of ensuring an immersive XR device is selected.
|
||
// FIXME: Implement https://immersive-web.github.io/webxr/#ensure-an-immersive-xr-device-is-selected
|
||
|
||
// 2. Set context’s XR compatible boolean as follows:
|
||
|
||
// -> If context’s WebGL context lost flag is set:
|
||
if (context->is_context_lost()) {
|
||
// Queue a task to set context’s XR compatible boolean to false and reject promise with an InvalidStateError.
|
||
HTML::queue_a_task(HTML::Task::Source::Unspecified, nullptr, nullptr, GC::create_function(realm.heap(), [&realm, promise, context]() {
|
||
context->set_xr_compatible(false);
|
||
HTML::TemporaryExecutionContext execution_context { realm, HTML::TemporaryExecutionContext::CallbacksEnabled::Yes };
|
||
WebIDL::reject_promise(realm, promise, WebIDL::InvalidStateError::create(realm, "The WebGL context has been lost."_utf16));
|
||
}));
|
||
}
|
||
// -> If device is null:
|
||
else if (false) {
|
||
// Queue a task to set context’s XR compatible boolean to false and reject promise with an InvalidStateError.
|
||
HTML::queue_a_task(HTML::Task::Source::Unspecified, nullptr, nullptr, GC::create_function(realm.heap(), [&realm, promise, context]() {
|
||
context->set_xr_compatible(false);
|
||
HTML::TemporaryExecutionContext execution_context { realm, HTML::TemporaryExecutionContext::CallbacksEnabled::Yes };
|
||
WebIDL::reject_promise(realm, promise, WebIDL::InvalidStateError::create(realm, "Could not select an immersive XR device."_utf16));
|
||
}));
|
||
}
|
||
// -> If context’s XR compatible boolean is true:
|
||
else if (context->xr_compatible()) {
|
||
// Queue a task to resolve promise.
|
||
HTML::queue_a_task(HTML::Task::Source::Unspecified, nullptr, nullptr, GC::create_function(realm.heap(), [&realm, promise]() {
|
||
HTML::TemporaryExecutionContext execution_context { realm, HTML::TemporaryExecutionContext::CallbacksEnabled::Yes };
|
||
WebIDL::resolve_promise(realm, promise);
|
||
}));
|
||
}
|
||
// -> If context was created on a compatible graphics adapter for device:
|
||
// FIXME: For now we just pretend that this happened, so that we can resolve the promise and proceed running basic WPT tests for this.
|
||
else if (true) {
|
||
// Queue a task to set context’s XR compatible boolean to true and resolve promise.
|
||
HTML::queue_a_task(HTML::Task::Source::Unspecified, nullptr, nullptr, GC::create_function(realm.heap(), [&realm, promise, context]() {
|
||
context->set_xr_compatible(true);
|
||
HTML::TemporaryExecutionContext execution_context { realm, HTML::TemporaryExecutionContext::CallbacksEnabled::Yes };
|
||
WebIDL::resolve_promise(realm, promise);
|
||
}));
|
||
}
|
||
// -> Otherwise:
|
||
else {
|
||
// Queue a task on the WebGL task source to perform the following steps:
|
||
HTML::queue_a_task(HTML::Task::Source::WebGL, nullptr, nullptr, GC::create_function(realm.heap(), []() {
|
||
// 1. Force context to be lost.
|
||
|
||
// 2. Handle the context loss as described by the WebGL specification:
|
||
// FIXME: Implement https://registry.khronos.org/webgl/specs/latest/1.0/#CONTEXT_LOST
|
||
}));
|
||
}
|
||
}));
|
||
|
||
// 5. Return promise.
|
||
return promise;
|
||
}
|
||
|
||
}
|