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Workaround for WebGL driver bug

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Christian Semmler 2025-07-24 08:27:31 -07:00
parent b69687d2f1
commit 0fc0b07d31
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1 changed files with 11 additions and 0 deletions
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11
miniwin/src/d3drm/backends/opengles3/renderer.cpp
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@ -744,6 +744,17 @@ void OpenGLES3Renderer::Flip()
glBindFramebuffer(GL_READ_FRAMEBUFFER, m_fbo); glBindFramebuffer(GL_READ_FRAMEBUFFER, m_fbo);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
// This is a workaround for what is (presumably) a driver bug in some WebGL environments (Android Chrome)
// During transitions, the screen would sometimes (randomly) briefly be cleared / flicker black when using
// glBlitFramebuffer. Any write to the back buffer before that fixes this issue. The following should have minimal
// performance impact.
glEnable(GL_SCISSOR_TEST);
glScissor(0, 0, 1, 1);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT);
glDisable(GL_SCISSOR_TEST);
glBlitFramebuffer(0, 0, m_width, m_height, 0, 0, m_width, m_height, GL_COLOR_BUFFER_BIT, GL_NEAREST); glBlitFramebuffer(0, 0, m_width, m_height, 0, 0, m_width, m_height, GL_COLOR_BUFFER_BIT, GL_NEAREST);
SDL_GL_SwapWindow(DDWindow); SDL_GL_SwapWindow(DDWindow);