Sunpy/opsu-dance
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Backup and restore the viewport size when rendering sliders. Needed because Slick tends to allocate offscreen buffers for itself only with power of two textures, so it will use another viewport when rendering to its own offscreen buffers.

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This commit is contained in:
Peter Tissen 2015-07-08 16:18:41 +02:00
parent 26ab61910e
commit 420f1fb02c
1 changed files with 10 additions and 4 deletions
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14
src/itdelatrisu/opsu/render/CurveRenderState.java
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@ -24,6 +24,7 @@ import itdelatrisu.opsu.objects.curves.Vec2f;
import java.nio.ByteBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import org.lwjgl.BufferUtils;
import org.lwjgl.opengl.GL11;
@ -114,9 +115,13 @@ public class CurveRenderState {
mapping = cache.insert(hitObject);
fbo = mapping;
int old_fb = GL11.glGetInteger(GL30.GL_FRAMEBUFFER_BINDING);
int old_tex = GL11.glGetInteger(GL11.GL_TEXTURE_BINDING_2D);
int oldFb = GL11.glGetInteger(GL30.GL_FRAMEBUFFER_BINDING);
int oldTex = GL11.glGetInteger(GL11.GL_TEXTURE_BINDING_2D);
//glGetInteger requires a buffer of size 16, even though just 4
//values are returned in this specific case
IntBuffer oldViewport = BufferUtils.createIntBuffer(16);
GL11.glGetInteger(GL11.GL_VIEWPORT, oldViewport);
GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, fbo.getID());
GL11.glViewport(0, 0, fbo.width, fbo.height);
GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
@ -125,8 +130,9 @@ public class CurveRenderState {
this.draw_curve(color, borderColor, curve);
color.a = 1f;
GL11.glBindTexture(GL11.GL_TEXTURE_2D, old_tex);
GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, old_fb);
GL11.glBindTexture(GL11.GL_TEXTURE_2D, oldTex);
GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, oldFb);
GL11.glViewport(oldViewport.get(0), oldViewport.get(1), oldViewport.get(2), oldViewport.get(3));
Utils.COLOR_WHITE_FADE.a = alpha;
}