diff options
Diffstat (limited to 'src/video/opengl.cpp')
| -rw-r--r-- | src/video/opengl.cpp | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/video/opengl.cpp b/src/video/opengl.cpp index dbb5ee01a..7fc9c33b0 100644 --- a/src/video/opengl.cpp +++ b/src/video/opengl.cpp @@ -24,6 +24,7 @@ #include "opengl.h" #include "../core/mem_func.hpp" +#include "../core/geometry_func.hpp" #include "../gfx_func.h" #include "../debug.h" @@ -292,8 +293,9 @@ bool OpenGLBackend::Resize(int w, int h, bool force) /** * Render video buffer to the screen. + * @param update_rect Rectangle encompassing the dirty region of the video buffer. */ -void OpenGLBackend::Paint() +void OpenGLBackend::Paint(Rect update_rect) { assert(this->vid_buffer != nullptr); @@ -301,8 +303,10 @@ void OpenGLBackend::Paint() /* Update changed rect of the video buffer texture. */ glBindTexture(GL_TEXTURE_2D, this->vid_texture); - glPixelStorei(GL_UNPACK_ROW_LENGTH, _screen.pitch); - glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, _screen.width, _screen.height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, this->vid_buffer); + if (!IsEmptyRect(update_rect)) { + glPixelStorei(GL_UNPACK_ROW_LENGTH, _screen.pitch); + glTexSubImage2D(GL_TEXTURE_2D, 0, update_rect.left, update_rect.top, update_rect.right - update_rect.left, update_rect.bottom - update_rect.top, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, (uint32 *)this->vid_buffer + update_rect.top * _screen.pitch + update_rect.left); + } /* Blit video buffer to screen. */ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); |