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@@ -24,6 +24,7 @@
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#include "opengl.h"
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#include "../core/mem_func.hpp"
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#include "../core/geometry_func.hpp"
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#include "../gfx_func.h"
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#include "../debug.h"
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@@ -292,8 +293,9 @@ bool OpenGLBackend::Resize(int w, int h,
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/**
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* Render video buffer to the screen.
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* @param update_rect Rectangle encompassing the dirty region of the video buffer.
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*/
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void OpenGLBackend::Paint()
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void OpenGLBackend::Paint(Rect update_rect)
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{
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assert(this->vid_buffer != nullptr);
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@@ -301,8 +303,10 @@ void OpenGLBackend::Paint()
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/* Update changed rect of the video buffer texture. */
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glBindTexture(GL_TEXTURE_2D, this->vid_texture);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, _screen.pitch);
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glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, _screen.width, _screen.height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, this->vid_buffer);
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if (!IsEmptyRect(update_rect)) {
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glPixelStorei(GL_UNPACK_ROW_LENGTH, _screen.pitch);
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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);
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}
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/* Blit video buffer to screen. */
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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