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GPU: forward BG0HOFS to internal rendering engine register for 3D layer scroll (only when the rendering engine is enabled).

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fixes #840

thank you RSDuck and Hydr8gon for your insight into this.
This commit is contained in:
Arisotura
2020-12-10 19:12:08 +01:00
parent 1dbe69c6be
commit 66cec85a9a
6 changed files with 81 additions and 37 deletions
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5
src/GPU_OpenGL.cpp
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@ -36,6 +36,7 @@ int ScreenH, ScreenW;
GLuint CompShader[1][3];
GLuint CompScaleLoc[1];
GLuint Comp3DXPosLoc[1];
GLuint CompVertexBufferID;
GLuint CompVertexArrayID;
@ -64,6 +65,7 @@ bool Init()
return false;
CompScaleLoc[i] = glGetUniformLocation(CompShader[i][2], "u3DScale");
Comp3DXPosLoc[i] = glGetUniformLocation(CompShader[i][2], "u3DXPos");
glUseProgram(CompShader[i][2]);
uni_id = glGetUniformLocation(CompShader[i][2], "ScreenTex");
@ -180,6 +182,9 @@ void RenderFrame()
OpenGL::UseShaderProgram(CompShader[0]);
glUniform1ui(CompScaleLoc[0], Scale);
// TODO: support setting this midframe, if ever needed
glUniform1i(Comp3DXPosLoc[0], ((int)GPU3D::RenderXPos << 23) >> 23);
int frontbuf = GPU::FrontBuffer;
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, CompScreenInputTex);