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https://repo.dactyloidae.xyz/Dactyloidae/UXP.git
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84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#define COBJMACROS
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#include "GpuRasterD3D11.h"
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#include <limits.h>
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static BOOL
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IntegerEdge(double value)
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{
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/* Ordered comparisons reject NaNs and infinities before integer conversion. */
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return value >= LONG_MIN && value <= LONG_MAX && value == (LONG)value;
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}
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BOOL
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GpuRasterD3D11ClipRect(const GpuRasterRect* rect, const D3D11_RECT* clip,
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LONG width, LONG height, D3D11_RECT* result)
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{
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LONG left, top, right, bottom;
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if (!rect || !clip || !result || width <= 0 || height <= 0 ||
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!IntegerEdge(rect->left) || !IntegerEdge(rect->top) ||
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!IntegerEdge(rect->right) || !IntegerEdge(rect->bottom) ||
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rect->right < rect->left || rect->bottom < rect->top) {
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return FALSE;
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}
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left = (LONG)rect->left;
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top = (LONG)rect->top;
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right = (LONG)rect->right;
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bottom = (LONG)rect->bottom;
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if (left < clip->left) left = clip->left;
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if (top < clip->top) top = clip->top;
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if (right > clip->right) right = clip->right;
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if (bottom > clip->bottom) bottom = clip->bottom;
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if (left < 0) left = 0;
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if (top < 0) top = 0;
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if (right > width) right = width;
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if (bottom > height) bottom = height;
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if (right <= left || bottom <= top) {
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result->left = result->top = result->right = result->bottom = 0;
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} else {
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result->left = left;
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result->top = top;
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result->right = right;
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result->bottom = bottom;
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}
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return TRUE;
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}
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BOOL
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GpuRasterD3D11FillRect(ID3D11DeviceContext1* context,
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ID3D11RenderTargetView* target,
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LONG width, LONG height,
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const GpuRasterRect* rect, const D3D11_RECT* clip,
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const float color[4])
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{
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D3D11_RECT clipped;
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D3D11_RENDER_TARGET_VIEW_DESC desc;
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unsigned i;
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if (!context || !target || !color ||
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!GpuRasterD3D11ClipRect(rect, clip, width, height, &clipped)) {
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return FALSE;
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}
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for (i = 0; i < 4; ++i) {
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if (!(color[i] >= 0.0f && color[i] <= 1.0f)) {
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return FALSE;
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}
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}
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ID3D11RenderTargetView_GetDesc(target, &desc);
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if ((desc.Format != DXGI_FORMAT_B8G8R8A8_UNORM &&
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desc.Format != DXGI_FORMAT_R8G8B8A8_UNORM) ||
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desc.ViewDimension != D3D11_RTV_DIMENSION_TEXTURE2D ||
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desc.Texture2D.MipSlice != 0) {
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return FALSE;
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}
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if (clipped.right != clipped.left && clipped.bottom != clipped.top) {
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ID3D11DeviceContext1_ClearView(context, (ID3D11View*)target, color, &clipped, 1);
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}
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return TRUE;
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}
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