tests/common/offscreen_render_target_gl.cpp

/*
 * Copyright 2025 Rive
 */

#include "offscreen_render_target.hpp"

#ifdef RIVE_TOOLS_NO_GL

namespace rive_tests
{
rive::rcp<OffscreenRenderTarget> OffscreenRenderTarget::MakeGL(
    rive::gpu::RenderContextGLImpl*,
    uint32_t width,
    uint32_t height)
{
  return nullptr;
}
} // namespace rive_tests

#else

#include "rive/renderer/rive_render_image.hpp"
#include "rive/renderer/gl/render_context_gl_impl.hpp"
#include "rive/renderer/gl/render_target_gl.hpp"

namespace rive_tests
{
class OffscreenRenderTargetGL : public OffscreenRenderTarget
{
public:
  OffscreenRenderTargetGL(
      rive::gpu::RenderContextGLImpl* renderContextImpl,
      uint32_t width,
      uint32_t height)
      : m_textureTarget(
            rive::make_rcp<TextureTarget>(renderContextImpl, width, height))
  {}

  rive::RenderImage* asRenderImage() override
  {
    return m_textureTarget->renderImage();
  }

  rive::gpu::RenderTarget* asRenderTarget() override
  {
    return m_textureTarget.get();
  }

private:
  class TextureTarget : public rive::gpu::TextureRenderTargetGL
  {
  public:
    TextureTarget(
        rive::gpu::RenderContextGLImpl* renderContextImpl,
        uint32_t width,
        uint32_t height)
        : TextureRenderTargetGL(width, height)
    {
      GLuint tex;
      glGenTextures(1, &tex);
      glActiveTexture(GL_TEXTURE0);
      glBindTexture(GL_TEXTURE_2D, tex);
      glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, 256, 256);
      m_renderImage = rive::make_rcp<rive::RiveRenderImage>(
          renderContextImpl->adoptImageTexture(width, height, tex));
      setTargetTexture(tex);
    }

    rive::RiveRenderImage* renderImage() const { return m_renderImage.get(); }

  private:
    rive::rcp<rive::RiveRenderImage> m_renderImage;
  };

  rive::rcp<TextureTarget> m_textureTarget;
};

rive::rcp<OffscreenRenderTarget> OffscreenRenderTarget::MakeGL(
    rive::gpu::RenderContextGLImpl* impl,
    uint32_t width,
    uint32_t height)
{
  return rive::make_rcp<OffscreenRenderTargetGL>(impl, width, height);
}
}; // namespace rive_tests

#endif