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#include "cru/platform/graphics/cairo/CairoPainter.h"
#include "cru/common/Exception.h"
#include "cru/platform/Check.h"
#include "cru/platform/Exception.h"
#include "cru/platform/graphics/cairo/Base.h"
#include "cru/platform/graphics/cairo/CairoBrush.h"
#include "cru/platform/graphics/cairo/CairoGeometry.h"
#include "cru/platform/graphics/cairo/CairoImage.h"
#include "cru/platform/graphics/cairo/CairoResource.h"
#include "cru/platform/graphics/cairo/PangoTextLayout.h"
#include <pango/pangocairo.h>
namespace cru::platform::graphics::cairo {
CairoPainter::CairoPainter(CairoGraphicsFactory* factory, cairo_t* cairo,
bool auto_release, cairo_surface_t* cairo_surface)
: CairoResource(factory),
cairo_(cairo),
auto_release_(auto_release),
cairo_surface_(cairo_surface) {}
CairoPainter::~CairoPainter() {
if (auto_release_) {
cairo_destroy(cairo_);
}
}
Matrix CairoPainter::GetTransform() {
CheckValidation();
cairo_matrix_t matrix;
cairo_get_matrix(cairo_, &matrix);
return Convert(matrix);
}
void CairoPainter::SetTransform(const Matrix& matrix) {
CheckValidation();
auto m = Convert(matrix);
cairo_set_matrix(cairo_, &m);
}
void CairoPainter::ConcatTransform(const Matrix& matrix) {
CheckValidation();
auto m = Convert(matrix);
cairo_transform(cairo_, &m);
}
void CairoPainter::Clear(const Color& color) {
CheckValidation();
cairo_set_source_rgba(cairo_, color.GetFloatRed(), color.GetFloatGreen(),
color.GetFloatBlue(), color.GetFloatAlpha());
cairo_paint(cairo_);
}
void CairoPainter::DrawLine(const Point& start, const Point& end, IBrush* brush,
float width) {
CheckValidation();
auto cairo_brush = CheckPlatform<CairoBrush>(brush, GetPlatformId());
auto cairo_pattern = cairo_brush->GetCairoPattern();
cairo_save(cairo_);
cairo_set_source(cairo_, cairo_pattern);
cairo_set_line_width(cairo_, width);
cairo_new_path(cairo_);
cairo_move_to(cairo_, start.x, start.y);
cairo_line_to(cairo_, end.x, end.y);
cairo_stroke(cairo_);
cairo_restore(cairo_);
}
void CairoPainter::StrokeRectangle(const Rect& rectangle, IBrush* brush,
float width) {
CheckValidation();
auto cairo_brush = CheckPlatform<CairoBrush>(brush, GetPlatformId());
auto cairo_pattern = cairo_brush->GetCairoPattern();
cairo_save(cairo_);
cairo_set_source(cairo_, cairo_pattern);
cairo_set_line_width(cairo_, width);
cairo_new_path(cairo_);
cairo_rectangle(cairo_, rectangle.left, rectangle.top, rectangle.width,
rectangle.height);
cairo_stroke(cairo_);
cairo_restore(cairo_);
}
void CairoPainter::FillRectangle(const Rect& rectangle, IBrush* brush) {
CheckValidation();
auto cairo_brush = CheckPlatform<CairoBrush>(brush, GetPlatformId());
auto cairo_pattern = cairo_brush->GetCairoPattern();
cairo_save(cairo_);
cairo_set_source(cairo_, cairo_pattern);
cairo_new_path(cairo_);
cairo_rectangle(cairo_, rectangle.left, rectangle.top, rectangle.width,
rectangle.height);
cairo_fill(cairo_);
cairo_restore(cairo_);
}
void CairoPainter::StrokeEllipse(const Rect& outline_rect, IBrush* brush,
float width) {
CheckValidation();
auto cairo_brush = CheckPlatform<CairoBrush>(brush, GetPlatformId());
auto cairo_pattern = cairo_brush->GetCairoPattern();
cairo_save(cairo_);
cairo_set_source(cairo_, cairo_pattern);
cairo_set_line_width(cairo_, width);
{
auto center = outline_rect.GetCenter();
cairo_matrix_t save_matrix;
cairo_get_matrix(cairo_, &save_matrix);
cairo_translate(cairo_, center.x, center.y);
cairo_scale(cairo_, 1, outline_rect.height / outline_rect.width);
cairo_translate(cairo_, -center.x, -center.y);
cairo_new_path(cairo_);
cairo_arc(cairo_, center.x, center.y, outline_rect.width / 2.0, 0,
2 * M_PI);
cairo_set_matrix(cairo_, &save_matrix);
}
cairo_stroke(cairo_);
cairo_restore(cairo_);
}
void CairoPainter::FillEllipse(const Rect& outline_rect, IBrush* brush) {
CheckValidation();
auto cairo_brush = CheckPlatform<CairoBrush>(brush, GetPlatformId());
auto cairo_pattern = cairo_brush->GetCairoPattern();
cairo_save(cairo_);
cairo_set_source(cairo_, cairo_pattern);
{
auto center = outline_rect.GetCenter();
cairo_matrix_t save_matrix;
cairo_get_matrix(cairo_, &save_matrix);
cairo_translate(cairo_, center.x, center.y);
cairo_scale(cairo_, 1, outline_rect.height / outline_rect.width);
cairo_translate(cairo_, -center.x, -center.y);
cairo_new_path(cairo_);
cairo_arc(cairo_, center.x, center.y, outline_rect.width / 2.0, 0,
2 * M_PI);
cairo_set_matrix(cairo_, &save_matrix);
}
cairo_fill(cairo_);
cairo_restore(cairo_);
}
void CairoPainter::StrokeGeometry(IGeometry* geometry, IBrush* brush,
float width) {
CheckValidation();
auto cairo_geometry = CheckPlatform<CairoGeometry>(geometry, GetPlatformId());
auto cairo_brush = CheckPlatform<CairoBrush>(brush, GetPlatformId());
auto cairo_path = cairo_geometry->GetCairoPath();
auto cairo_pattern = cairo_brush->GetCairoPattern();
cairo_save(cairo_);
cairo_set_source(cairo_, cairo_pattern);
cairo_set_line_width(cairo_, width);
cairo_new_path(cairo_);
cairo_append_path(cairo_, cairo_path);
cairo_stroke(cairo_);
cairo_restore(cairo_);
}
void CairoPainter::FillGeometry(IGeometry* geometry, IBrush* brush) {
CheckValidation();
auto cairo_geometry = CheckPlatform<CairoGeometry>(geometry, GetPlatformId());
auto cairo_brush = CheckPlatform<CairoBrush>(brush, GetPlatformId());
auto cairo_path = cairo_geometry->GetCairoPath();
auto cairo_pattern = cairo_brush->GetCairoPattern();
cairo_save(cairo_);
cairo_set_source(cairo_, cairo_pattern);
cairo_new_path(cairo_);
cairo_append_path(cairo_, cairo_path);
cairo_fill(cairo_);
cairo_restore(cairo_);
}
void CairoPainter::DrawText(const Point& offset, ITextLayout* text_layout,
IBrush* brush) {
CheckValidation();
auto pango_text_layout =
CheckPlatform<PangoTextLayout>(text_layout, GetPlatformId());
auto cairo_brush = CheckPlatform<CairoBrush>(brush, GetPlatformId());
auto cairo_pattern = cairo_brush->GetCairoPattern();
cairo_save(cairo_);
cairo_set_source(cairo_, cairo_pattern);
pango_cairo_show_layout(cairo_, pango_text_layout->GetPangoLayout());
cairo_restore(cairo_);
}
void CairoPainter::DrawImage(const Point& offset, IImage* image) {
CheckValidation();
auto cairo_image = CheckPlatform<CairoImage>(image, GetPlatformId());
cairo_save(cairo_);
cairo_set_source_surface(cairo_, cairo_image->GetCairoSurface(), 0, 0);
cairo_new_path(cairo_);
cairo_rectangle(cairo_, offset.x, offset.y, image->GetWidth(),
image->GetHeight());
cairo_fill(cairo_);
cairo_restore(cairo_);
}
void CairoPainter::PushLayer(const Rect& bounds) {
CheckValidation();
layer_stack_.push_back(bounds);
cairo_reset_clip(cairo_);
cairo_new_path(cairo_);
cairo_rectangle(cairo_, bounds.left, bounds.top, bounds.width, bounds.height);
cairo_clip(cairo_);
}
void CairoPainter::PopLayer() {
CheckValidation();
layer_stack_.pop_back();
cairo_reset_clip(cairo_);
if (!layer_stack_.empty()) {
auto clip = layer_stack_.back();
cairo_new_path(cairo_);
cairo_rectangle(cairo_, clip.left, clip.top, clip.width, clip.height);
cairo_clip(cairo_);
}
}
void CairoPainter::PushState() {
CheckValidation();
cairo_save(cairo_);
}
void CairoPainter::PopState() {
CheckValidation();
cairo_restore(cairo_);
}
void CairoPainter::EndDraw() {
if (cairo_surface_ != nullptr) {
cairo_surface_flush(cairo_surface_);
}
valid_ = false;
}
void CairoPainter::CheckValidation() {
if (!valid_) {
throw ReuseException(u"Painter already ended drawing.");
}
}
} // namespace cru::platform::graphics::cairo
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