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https://github.com/hajimehoshi/ebiten.git
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566957dc1c
Instead of using a negative height in the viewport, invert the Y direction at the vertex shader. This is a little more readable as a negative height is hacky. This is a preparation for DirectX 12. DirectX 12's coodination system is very similar to Metal, but doesn't treat a negative height in its viewport unfortunately. Updates #1007
110 lines
2.7 KiB
Go
110 lines
2.7 KiB
Go
// Copyright 2018 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package graphicsdriver
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import (
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"errors"
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"github.com/hajimehoshi/ebiten/v2/internal/graphics"
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"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
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)
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type Region struct {
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X float32
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Y float32
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Width float32
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Height float32
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}
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const (
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InvalidImageID = 0
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InvalidShaderID = 0
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)
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type ColorM interface {
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IsIdentity() bool
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At(i, j int) float32
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Elements(body *[16]float32, translate *[4]float32)
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}
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type Uniform struct {
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Float32 float32
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Float32s []float32
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}
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type Graphics interface {
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Begin()
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End(present bool)
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SetTransparent(transparent bool)
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SetVertices(vertices []float32, indices []uint16)
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NewImage(width, height int) (Image, error)
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NewScreenFramebufferImage(width, height int) (Image, error)
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Initialize() error
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SetVsyncEnabled(enabled bool)
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SetFullscreen(fullscreen bool)
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FramebufferYDirection() YDirection
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NDCYDirection() YDirection
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NeedsRestoring() bool
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NeedsClearingScreen() bool
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IsGL() bool
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HasHighPrecisionFloat() bool
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MaxImageSize() int
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NewShader(program *shaderir.Program) (Shader, error)
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// DrawTriangles draws an image onto another image with the given parameters.
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//
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// uniforms represents a colletion of uniform variables. The values must be one of these types:
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//
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// * float32
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// * []float32
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DrawTriangles(dst ImageID, srcs [graphics.ShaderImageNum]ImageID, offsets [graphics.ShaderImageNum - 1][2]float32, shader ShaderID, indexLen int, indexOffset int, mode CompositeMode, colorM ColorM, filter Filter, address Address, dstRegion, srcRegion Region, uniforms []Uniform, evenOdd bool) error
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}
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// GraphicsNotReady represents that the graphics driver is not ready for recovering from the context lost.
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var GraphicsNotReady = errors.New("graphics not ready")
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type Image interface {
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ID() ImageID
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Dispose()
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IsInvalidated() bool
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Pixels() ([]byte, error)
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ReplacePixels(args []*ReplacePixelsArgs)
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}
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type ImageID int
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type ReplacePixelsArgs struct {
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Pixels []byte
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X int
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Y int
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Width int
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Height int
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}
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type YDirection int
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const (
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Upward YDirection = iota
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Downward
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)
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type Shader interface {
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ID() ShaderID
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Dispose()
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}
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type ShaderID int
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