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prevent bleeding in screen texture

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fixes #920
This commit is contained in:
RSDuck
2021-01-02 08:55:48 +01:00
parent fa4363ede6
commit 18fe5c6759
3 changed files with 52 additions and 28 deletions
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25
src/frontend/qt_sdl/main.cpp
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@ -867,22 +867,26 @@ void ScreenPanelGL::initializeGL()
screenShader->setUniformValue("ScreenTex", (GLint)0);
screenShader->release();
// to prevent bleeding between both parts of the screen
// with bilinear filtering enabled
const int paddedHeight = 192*2+2;
const float padPixels = 1.f / paddedHeight;
float vertices[] =
const float vertices[] =
{
0, 0, 0, 0,
0, 192, 0, 0.5,
256, 192, 1, 0.5,
0, 192, 0, 0.5 - padPixels,
256, 192, 1, 0.5 - padPixels,
0, 0, 0, 0,
256, 192, 1, 0.5,
256, 192, 1, 0.5 - padPixels,
256, 0, 1, 0,
0, 0, 0, 0.5,
0, 0, 0, 0.5 + padPixels,
0, 192, 0, 1,
256, 192, 1, 1,
0, 0, 0, 0.5,
0, 0, 0, 0.5 + padPixels,
256, 192, 1, 1,
256, 0, 1, 0.5
256, 0, 1, 0.5 + padPixels
};
glGenBuffers(1, &screenVertexBuffer);
@ -903,7 +907,10 @@ void ScreenPanelGL::initializeGL()
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 192*2, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, paddedHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
// fill the padding
u8 zeroData[256*4*4] = {0};
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 192, 256, 2, GL_RGBA, GL_UNSIGNED_BYTE, zeroData);
OSD::Init(this);
}
@ -941,7 +948,7 @@ void ScreenPanelGL::paintGL()
{
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 256, 192, GL_RGBA,
GL_UNSIGNED_BYTE, GPU::Framebuffer[frontbuf][0]);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 192, 256, 192, GL_RGBA,
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 192+2, 256, 192, GL_RGBA,
GL_UNSIGNED_BYTE, GPU::Framebuffer[frontbuf][1]);
}
}