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OpenGLHostDisplay: Work around functions unavailable in GLES2

This commit is contained in:
Connor McLaughlin 2021-01-26 01:34:13 +10:00
parent 24dd49e05d
commit 8cafe856f0
2 changed files with 37 additions and 17 deletions
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23
src/common/gl/texture.cpp
View File

@ -184,24 +184,33 @@ void Texture::GetTextureSubImage(GLuint texture, GLint level, GLint xoffset, GLi
return;
}
GLenum target = GL_READ_FRAMEBUFFER;
GLenum target_binding = GL_READ_FRAMEBUFFER_BINDING;
if (GLAD_GL_ES_VERSION_2_0 && !GLAD_GL_ES_VERSION_3_0)
{
// GLES2 doesn't have GL_READ_FRAMEBUFFER.
target = GL_FRAMEBUFFER;
target_binding = GL_FRAMEBUFFER_BINDING;
}
Assert(depth == 1);
GLuint old_read_fbo;
glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, reinterpret_cast<GLint*>(&old_read_fbo));
glGetIntegerv(target_binding, reinterpret_cast<GLint*>(&old_read_fbo));
GLuint temp_fbo;
glGenFramebuffers(1, &temp_fbo);
glBindFramebuffer(GL_FRAMEBUFFER, temp_fbo);
glBindFramebuffer(target, temp_fbo);
if (zoffset > 0 && (GLAD_GL_VERSION_3_0 || GLAD_GL_ES_VERSION_3_0))
glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture, level, zoffset);
glFramebufferTextureLayer(target, GL_COLOR_ATTACHMENT0, texture, level, zoffset);
else
glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, level);
glFramebufferTexture2D(target, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, level);
DebugAssert(glCheckFramebufferStatus(GL_READ_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
DebugAssert(glCheckFramebufferStatus(target) == GL_FRAMEBUFFER_COMPLETE);
glReadPixels(xoffset, yoffset, width, height, format, type, pixels);
glBindFramebuffer(GL_READ_FRAMEBUFFER, old_read_fbo);
glBindFramebuffer(target, old_read_fbo);
glDeleteFramebuffers(1, &temp_fbo);
}
} // namespace GL
} // namespace GL

31
src/frontend-common/opengl_host_display.cpp
View File

@ -104,17 +104,23 @@ void OpenGLHostDisplay::UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y,
GLint old_texture_binding = 0, old_alignment = 0, old_row_length = 0;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &old_texture_binding);
glGetIntegerv(GL_UNPACK_ALIGNMENT, &old_alignment);
glGetIntegerv(GL_UNPACK_ROW_LENGTH, &old_row_length);
glBindTexture(GL_TEXTURE_2D, tex->GetGLID());
glGetIntegerv(GL_UNPACK_ALIGNMENT, &old_alignment);
glPixelStorei(GL_UNPACK_ALIGNMENT, alignment);
glPixelStorei(GL_UNPACK_ROW_LENGTH, texture_data_stride / GetDisplayPixelFormatSize(texture->GetFormat()));
if (!m_use_gles2_draw_path)
{
glGetIntegerv(GL_UNPACK_ROW_LENGTH, &old_row_length);
glPixelStorei(GL_UNPACK_ROW_LENGTH, texture_data_stride / GetDisplayPixelFormatSize(texture->GetFormat()));
}
glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, gl_format, gl_type, texture_data);
if (!m_use_gles2_draw_path)
glPixelStorei(GL_UNPACK_ROW_LENGTH, old_row_length);
glPixelStorei(GL_UNPACK_ALIGNMENT, old_alignment);
glPixelStorei(GL_UNPACK_ROW_LENGTH, old_row_length);
glBindTexture(GL_TEXTURE_2D, old_texture_binding);
}
@ -131,9 +137,12 @@ bool OpenGLHostDisplay::DownloadTexture(const void* texture_handle, HostDisplayP
GLint old_alignment = 0, old_row_length = 0;
glGetIntegerv(GL_PACK_ALIGNMENT, &old_alignment);
glGetIntegerv(GL_PACK_ROW_LENGTH, &old_row_length);
glPixelStorei(GL_PACK_ALIGNMENT, alignment);
glPixelStorei(GL_PACK_ROW_LENGTH, out_data_stride / GetDisplayPixelFormatSize(texture_format));
if (!m_use_gles2_draw_path)
{
glGetIntegerv(GL_PACK_ROW_LENGTH, &old_row_length);
glPixelStorei(GL_PACK_ROW_LENGTH, out_data_stride / GetDisplayPixelFormatSize(texture_format));
}
const GLuint texture = static_cast<GLuint>(reinterpret_cast<uintptr_t>(texture_handle));
const auto [gl_internal_format, gl_format, gl_type] =
@ -143,7 +152,8 @@ bool OpenGLHostDisplay::DownloadTexture(const void* texture_handle, HostDisplayP
out_data);
glPixelStorei(GL_PACK_ALIGNMENT, old_alignment);
glPixelStorei(GL_PACK_ROW_LENGTH, old_row_length);
if (!m_use_gles2_draw_path)
glPixelStorei(GL_PACK_ROW_LENGTH, old_row_length);
return true;
}
@ -333,7 +343,9 @@ bool OpenGLHostDisplay::CreateRenderDevice(const WindowInfo& wi, std::string_vie
bool OpenGLHostDisplay::InitializeRenderDevice(std::string_view shader_cache_directory, bool debug_device,
bool threaded_presentation)
{
glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, reinterpret_cast<GLint*>(&m_uniform_buffer_alignment));
m_use_gles2_draw_path = (GetRenderAPI() == HostDisplay::RenderAPI::OpenGLES && !GLAD_GL_ES_VERSION_3_0);
if (!m_use_gles2_draw_path)
glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, reinterpret_cast<GLint*>(&m_uniform_buffer_alignment));
if (debug_device && GLAD_GL_KHR_debug)
{
@ -483,7 +495,6 @@ void OpenGLHostDisplay::DestroyImGuiContext()
bool OpenGLHostDisplay::CreateResources()
{
m_use_gles2_draw_path = (GetRenderAPI() == HostDisplay::RenderAPI::OpenGLES && !GLAD_GL_ES_VERSION_3_0);
if (!m_use_gles2_draw_path)
{
static constexpr char fullscreen_quad_vertex_shader[] = R"(