Share Canvas state GL dispatch adapters

docs/modernization/build-inventory.md

@@ -556,9 +556,13 @@ powershell -ExecutionPolicy Bypass -File scripts\automation\apple-remote-build.p
   queries now use tested backend query dispatch too. Retained `Canvas` stroke draw/commit, thumbnail
   generation, object rendering, and `LayerFrame::clear` saved viewport or
   clear-color query plus clear-color restore paths also use tested
-  `pp_renderer_gl` dispatch helpers. `NodeCanvas` saved viewport/clear-color
-  query, density/offscreen color clear, and clear-color restore paths use the
-  same helpers. `NodeCanvas` and `NodeStrokePreview` now share
+  `pp_renderer_gl` dispatch helpers. Retained `Canvas` active texture, fallback
+  texture unbind, viewport/scissor execution, viewport and clear-color query,
+  clear-color restore, and capability query/apply adapter endpoints now share
+  `legacy_ui_gl_dispatch`; Canvas depth renderbuffer allocation/attachment/delete
+  remains a separate retained renderer-resource bridge. `NodeCanvas` saved
+  viewport/clear-color query, density/offscreen color clear, and clear-color
+  restore paths use the same helpers. `NodeCanvas` and `NodeStrokePreview` now share
   `legacy_ui_gl_dispatch` for active texture, texture unbind, viewport/scissor,
   clear-color, color-buffer clear, and capability query/apply adapter endpoints.
   `CanvasMode` overlay, mask, transform, and canvas-tip pick paths now also

docs/modernization/roadmap.md

@@ -1268,8 +1268,13 @@ snapshots now route through the same backend dispatch contracts. Retained
 `Canvas` stroke draw/commit, thumbnail
 generation, object drawing, and `LayerFrame::clear` saved viewport/clear-color
 query plus clear-color restore paths also use tested `pp_renderer_gl` dispatch
-helpers. `NodeCanvas` saved viewport/clear-color query, density target color
-clear, and clear-color restore paths use the same helpers. `NodeCanvas` and
+helpers. The retained `Canvas` active-texture, fallback texture unbind,
+viewport/scissor execution, viewport and clear-color query, clear-color
+restore, and capability query/apply adapter endpoints now share
+`legacy_ui_gl_dispatch`; Canvas depth renderbuffer allocation/attachment/delete
+remains a separate retained renderer-resource bridge under DEBT-0036.
+`NodeCanvas` saved viewport/clear-color query, density target color clear, and
+clear-color restore paths use the same helpers. `NodeCanvas` and
 `NodeStrokePreview` now share that retained UI GL dispatch bridge for
 active-texture, fallback texture unbind, viewport/scissor, clear-color,
 color-buffer clear, and capability query/apply adapter endpoints.
@@ -2532,6 +2537,11 @@ Results:
   `LayerFrame::clear` paths now use the same tested backend viewport query,
   clear-color query, and clear-color restore helpers, removing direct
   viewport/clear-state queries from `src/canvas.cpp` and the frame clear path.
+  Their active-texture selection, fallback 2D texture unbind, viewport/scissor
+  execution, clear-color restore, and capability query/apply adapter endpoints
+  now share `legacy_ui_gl_dispatch`; retained Canvas depth renderbuffer
+  allocation/attachment/delete remains open as a renderer-resource bridge under
+  DEBT-0036.
 - Canvas draw-merge shader-blend selection now consumes the extracted
   `pp_paint_renderer` stroke composite planner for current layer and primary
   brush blend modes, while preserving legacy OpenGL compositing execution under

src/canvas.cpp

@@ -2,6 +2,7 @@
 #include "log.h"
 #include "canvas.h"
 #include "app.h"
+#include "legacy_ui_gl_dispatch.h"
 #include "texture.h"
 #include "node_progress_bar.h"
 #include "paint_renderer/compositor.h"
@@ -142,177 +143,49 @@ pp::renderer::gl::OpenGlPixelFormat texture_format_for_image_channels(int channe
     return pp::renderer::gl::texture_format_for_channel_count(static_cast<std::uint32_t>(channel_count));
 }
 
-void activate_opengl_texture(std::uint32_t texture_unit) noexcept
-{
-    glActiveTexture(static_cast<GLenum>(texture_unit));
-}
-
-void bind_opengl_texture(std::uint32_t target, std::uint32_t texture) noexcept
-{
-    glBindTexture(static_cast<GLenum>(target), static_cast<GLuint>(texture));
-}
-
 void set_active_texture_unit(std::uint32_t unit_index)
 {
-    const auto status = pp::renderer::gl::activate_opengl_texture_unit(
-        unit_index,
-        pp::renderer::gl::OpenGlActiveTextureDispatch {
-            .active_texture = activate_opengl_texture,
-        });
-    if (!status.ok())
-        LOG("Canvas active texture dispatch failed because: %s", status.message);
+    pp::legacy::ui_gl::activate_texture_unit(unit_index, "Canvas");
 }
 
 void unbind_texture_2d()
 {
-    const auto status = pp::renderer::gl::bind_opengl_texture_2d(
-        0U,
-        pp::renderer::gl::OpenGlTexture2DBindDispatch {
-            .bind_texture = bind_opengl_texture,
-        });
-    if (!status.ok())
-        LOG("Canvas texture unbind dispatch failed because: %s", status.message);
-}
-
-void enable_opengl_state(std::uint32_t state) noexcept
-{
-    glEnable(static_cast<GLenum>(state));
-}
-
-void disable_opengl_state(std::uint32_t state) noexcept
-{
-    glDisable(static_cast<GLenum>(state));
-}
-
-std::uint8_t query_opengl_capability(std::uint32_t state) noexcept
-{
-    return static_cast<std::uint8_t>(glIsEnabled(static_cast<GLenum>(state)));
-}
-
-void set_opengl_viewport(std::int32_t x, std::int32_t y, std::int32_t width, std::int32_t height) noexcept
-{
-    glViewport(static_cast<GLint>(x), static_cast<GLint>(y), static_cast<GLsizei>(width), static_cast<GLsizei>(height));
-}
-
-void set_opengl_clear_color(float r, float g, float b, float a) noexcept
-{
-    glClearColor(r, g, b, a);
-}
-
-void get_opengl_integer(std::uint32_t name, std::int32_t* values) noexcept
-{
-    GLint raw_values[4] {};
-    glGetIntegerv(static_cast<GLenum>(name), raw_values);
-    values[0] = static_cast<std::int32_t>(raw_values[0]);
-    values[1] = static_cast<std::int32_t>(raw_values[1]);
-    values[2] = static_cast<std::int32_t>(raw_values[2]);
-    values[3] = static_cast<std::int32_t>(raw_values[3]);
-}
-
-void get_opengl_float(std::uint32_t name, float* values) noexcept
-{
-    glGetFloatv(static_cast<GLenum>(name), values);
-}
-
-void set_opengl_scissor(std::int32_t x, std::int32_t y, std::int32_t width, std::int32_t height) noexcept
-{
-    glScissor(static_cast<GLint>(x), static_cast<GLint>(y), static_cast<GLsizei>(width), static_cast<GLsizei>(height));
+    pp::legacy::ui_gl::unbind_texture_2d("Canvas");
 }
 
 void apply_canvas_viewport(std::int32_t x, std::int32_t y, std::int32_t width, std::int32_t height)
 {
-    const auto status = pp::renderer::gl::apply_opengl_viewport(
-        pp::renderer::gl::OpenGlViewportRect {
-            .x = x,
-            .y = y,
-            .width = width,
-            .height = height,
-        },
-        pp::renderer::gl::OpenGlViewportDispatch {
-            .viewport = set_opengl_viewport,
-        });
-    if (!status.ok())
-        LOG("Canvas viewport dispatch failed because: %s", status.message);
+    pp::legacy::ui_gl::apply_viewport(x, y, width, height, "Canvas");
 }
 
 pp::renderer::gl::OpenGlViewportRect query_canvas_viewport()
 {
-    const auto result = pp::renderer::gl::query_opengl_viewport(
-        pp::renderer::gl::OpenGlViewportQueryDispatch {
-            .get_integer = get_opengl_integer,
-        });
-    if (!result.ok()) {
-        LOG("Canvas viewport query dispatch failed because: %s", result.status().message);
-    }
-    return result.value();
+    return pp::legacy::ui_gl::query_viewport_rect("Canvas");
 }
 
 std::array<float, 4> query_canvas_clear_color()
 {
-    const auto result = pp::renderer::gl::query_opengl_clear_color(
-        pp::renderer::gl::OpenGlClearColorQueryDispatch {
-            .get_float = get_opengl_float,
-        });
-    if (!result.ok()) {
-        LOG("Canvas clear-color query dispatch failed because: %s", result.status().message);
-    }
-    return result.value();
+    return pp::legacy::ui_gl::query_clear_color("Canvas");
 }
 
 void apply_canvas_clear_color(std::array<float, 4> color)
 {
-    const auto status = pp::renderer::gl::apply_opengl_clear_color(
-        color,
-        pp::renderer::gl::OpenGlClearColorDispatch {
-            .clear_color = set_opengl_clear_color,
-        });
-    if (!status.ok())
-        LOG("Canvas clear-color dispatch failed because: %s", status.message);
+    pp::legacy::ui_gl::set_clear_color(color, "Canvas");
 }
 
 void apply_canvas_scissor(std::int32_t x, std::int32_t y, std::int32_t width, std::int32_t height)
 {
-    const auto status = pp::renderer::gl::apply_opengl_scissor_rect(
-        pp::renderer::gl::OpenGlScissorRect {
-            .enabled = 1U,
-            .x = x,
-            .y = y,
-            .width = width,
-            .height = height,
-        },
-        pp::renderer::gl::OpenGlScissorDispatch {
-            .enable = enable_opengl_state,
-            .disable = disable_opengl_state,
-            .scissor = set_opengl_scissor,
-        });
-    if (!status.ok())
-        LOG("Canvas scissor dispatch failed because: %s", status.message);
+    pp::legacy::ui_gl::apply_scissor_rect(x, y, width, height, "Canvas");
 }
 
 void apply_canvas_capability(std::uint32_t state, bool enabled)
 {
-    const auto status = pp::renderer::gl::apply_opengl_capability(
-        state,
-        enabled,
-        pp::renderer::gl::OpenGlCapabilityDispatch {
-            .enable = enable_opengl_state,
-            .disable = disable_opengl_state,
-        });
-    if (!status.ok())
-        LOG("Canvas capability dispatch failed because: %s", status.message);
+    pp::legacy::ui_gl::set_capability(state, enabled, "Canvas");
 }
 
 bool query_canvas_capability(std::uint32_t state)
 {
-    const auto result = pp::renderer::gl::query_opengl_capability_state(
-        state,
-        pp::renderer::gl::OpenGlCapabilityStateQueryDispatch {
-            .is_enabled = query_opengl_capability,
-        });
-    if (!result.ok()) {
-        LOG("Canvas capability query dispatch failed because: %s", result.status().message);
-    }
-    return result.value();
+    return pp::legacy::ui_gl::query_capability(state, "Canvas");
 }
 
 void gen_opengl_renderbuffers(std::uint32_t count, std::uint32_t* ids) noexcept