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Replace broken OpenGL solution with working one 

Previous one was utter nonsense upon closer inspection.

The one in glnvg__finishClip is tested, the one in glnvg__copyFBOToFrom is not because I couldn't figure out how to reach it. Same code however so, eh.
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asumface 2019-07-12 18:00:26 +02:00
parent c52fb47084
commit 5d6e320a77
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1 changed files with 19 additions and 31 deletions
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50
nanovega.d
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@ -13109,21 +13109,14 @@ void glnvg__copyFBOToFrom (GLNVGcontext* gl, int didx, int sidx) nothrow @truste
enum y = 0;
immutable int w = gl.fboWidth;
immutable int h = gl.fboHeight;
immutable(int[8]) vertices =
[x, y, // top-left
w, y, // top-right
w, h, // bottom-right
x, h]; // bottom-left
uint vbo;
glGenBuffers(1, &vbo); //TODO: figure out if allocating a new buffer each time is a good idea
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, vertices.sizeof, &vertices, GL_STREAM_DRAW);
uint vao;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glDrawArrays(GL_TRIANGLE_FAN, 0, 3);
glDeleteBuffers(1, &vbo);
glDeleteVertexArrays(1, &vao);
immutable(NVGVertex[4]) vertices =
[NVGVertex(x, y), // top-left
NVGVertex(w, y), // top-right
NVGVertex(w, h), // bottom-right
NVGVertex(x, h)]; // bottom-left
glBufferSubData(GL_ARRAY_BUFFER, 0, vertices.sizeof, &vertices);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
// restore state (but don't unbind FBO)
static if (NANOVG_GL_USE_STATE_FILTER) glBindTexture(GL_TEXTURE_2D, gl.boundTexture);
@ -13723,21 +13716,15 @@ void glnvg__finishClip (GLNVGcontext* gl, NVGClipMode clipmode) nothrow @trusted
glnvg__stencilFunc(gl, GL_NOTEQUAL, 0x00, 0xff);
glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO);
}
immutable(int[8]) vertices =
[0, 0,
0, gl.fboHeight,
gl.fboWidth, gl.fboHeight,
gl.fboWidth, 0];
uint vbo;
glGenBuffers(1, &vbo); //TODO: figure out if allocating a new buffer each time is a good idea
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, vertices.sizeof, &vertices, GL_STREAM_DRAW);
uint vao;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glDrawArrays(GL_TRIANGLE_FAN, 0, 3);
glDeleteBuffers(1, &vbo);
glDeleteVertexArrays(1, &vao);
immutable(NVGVertex[4]) vertices =
[NVGVertex(0, 0, 0, 0),
NVGVertex(0, gl.fboHeight, 0, 0),
NVGVertex(gl.fboWidth, gl.fboHeight, 0, 0),
NVGVertex(gl.fboWidth, 0, 0, 0)];
glBufferSubData(GL_ARRAY_BUFFER, 0, vertices.sizeof, &vertices);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
//glnvg__restoreAffine(gl);
}
@ -14177,7 +14164,8 @@ void glnvg__renderFlush (void* uptr) nothrow @trusted @nogc {
// Upload vertex data
glBindBuffer(GL_ARRAY_BUFFER, gl.vertBuf);
glBufferData(GL_ARRAY_BUFFER, gl.nverts*NVGVertex.sizeof, gl.verts, GL_STREAM_DRAW);
// ensure that there's space for at least 4 vertices in case we need to draw a quad (e. g. framebuffer copy)
glBufferData(GL_ARRAY_BUFFER, (gl.nverts < 4 ? 4 : gl.nverts) * NVGVertex.sizeof, gl.verts, GL_STREAM_DRAW);
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, NVGVertex.sizeof, cast(const(GLvoid)*)cast(usize)0);