mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-26 11:48:55 +01:00
241 lines
7.3 KiB
Go
241 lines
7.3 KiB
Go
// Copyright 2022 The Ebiten Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package ui
|
|
|
|
import (
|
|
"github.com/hajimehoshi/ebiten/v2/internal/affine"
|
|
"github.com/hajimehoshi/ebiten/v2/internal/atlas"
|
|
"github.com/hajimehoshi/ebiten/v2/internal/graphics"
|
|
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
|
|
"github.com/hajimehoshi/ebiten/v2/internal/mipmap"
|
|
)
|
|
|
|
// panicOnErrorOnReadingPixels indicates whether reading pixels panics on an error or not.
|
|
// This value is set only on testing.
|
|
var panicOnErrorOnReadingPixels bool
|
|
|
|
func SetPanicOnErrorOnReadingPixelsForTesting(value bool) {
|
|
panicOnErrorOnReadingPixels = value
|
|
}
|
|
|
|
type Image struct {
|
|
mipmap *mipmap.Mipmap
|
|
width int
|
|
height int
|
|
volatile bool
|
|
|
|
dotsCache map[[2]int][4]byte
|
|
}
|
|
|
|
func NewImage(width, height int, imageType atlas.ImageType) *Image {
|
|
return &Image{
|
|
mipmap: mipmap.New(width, height, imageType),
|
|
width: width,
|
|
height: height,
|
|
volatile: imageType == atlas.ImageTypeVolatile,
|
|
}
|
|
}
|
|
|
|
func (i *Image) MarkDisposed() {
|
|
if i.mipmap == nil {
|
|
return
|
|
}
|
|
i.mipmap.MarkDisposed()
|
|
i.mipmap = nil
|
|
i.dotsCache = nil
|
|
}
|
|
|
|
func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint16, colorm affine.ColorM, mode graphicsdriver.CompositeMode, filter graphicsdriver.Filter, address graphicsdriver.Address, dstRegion, srcRegion graphicsdriver.Region, subimageOffsets [graphics.ShaderImageCount - 1][2]float32, shader *Shader, uniforms [][]float32, evenOdd bool, canSkipMipmap bool) {
|
|
i.resolveDotsCacheIfNeeded()
|
|
|
|
var srcMipmaps [graphics.ShaderImageCount]*mipmap.Mipmap
|
|
for i, src := range srcs {
|
|
if src == nil {
|
|
continue
|
|
}
|
|
src.resolveDotsCacheIfNeeded()
|
|
srcMipmaps[i] = src.mipmap
|
|
}
|
|
|
|
var s *mipmap.Shader
|
|
if shader != nil {
|
|
s = shader.shader
|
|
}
|
|
|
|
i.mipmap.DrawTriangles(srcMipmaps, vertices, indices, colorm, mode, filter, address, dstRegion, srcRegion, subimageOffsets, s, uniforms, evenOdd, canSkipMipmap)
|
|
}
|
|
|
|
func (i *Image) WritePixels(pix []byte, x, y, width, height int) {
|
|
if width == 1 && height == 1 {
|
|
if i.dotsCache == nil {
|
|
i.dotsCache = map[[2]int][4]byte{}
|
|
}
|
|
|
|
var clr [4]byte
|
|
copy(clr[:], pix)
|
|
i.dotsCache[[2]int{x, y}] = clr
|
|
|
|
// One square requires 6 indices (= 2 triangles).
|
|
if len(i.dotsCache) >= graphics.IndicesCount/6 {
|
|
i.resolveDotsCacheIfNeeded()
|
|
}
|
|
return
|
|
}
|
|
|
|
i.resolveDotsCacheIfNeeded()
|
|
i.mipmap.WritePixels(pix, x, y, width, height)
|
|
}
|
|
|
|
func (i *Image) ReadPixels(pixels []byte, x, y, width, height int) {
|
|
// Check the error existence and avoid unnecessary calls.
|
|
if theGlobalState.error() != nil {
|
|
return
|
|
}
|
|
|
|
if width == 1 && height == 1 {
|
|
if c, ok := i.dotsCache[[2]int{x, y}]; ok {
|
|
copy(pixels, c[:])
|
|
return
|
|
}
|
|
// Do not call resolveDotsCacheIfNeeded here. This would slow (image/draw).Draw.
|
|
// See ebiten.TestImageDrawOver.
|
|
} else {
|
|
i.resolveDotsCacheIfNeeded()
|
|
}
|
|
|
|
if err := theUI.readPixels(i.mipmap, pixels, x, y, width, height); err != nil {
|
|
if panicOnErrorOnReadingPixels {
|
|
panic(err)
|
|
}
|
|
theGlobalState.setError(err)
|
|
}
|
|
}
|
|
|
|
func (i *Image) DumpScreenshot(name string, blackbg bool) (string, error) {
|
|
return theUI.dumpScreenshot(i.mipmap, name, blackbg)
|
|
}
|
|
|
|
func (i *Image) resolveDotsCacheIfNeeded() {
|
|
if len(i.dotsCache) == 0 {
|
|
return
|
|
}
|
|
|
|
l := len(i.dotsCache)
|
|
vs := graphics.Vertices(l * 4)
|
|
is := make([]uint16, l*6)
|
|
sx, sy := float32(1), float32(1)
|
|
var idx int
|
|
for p, c := range i.dotsCache {
|
|
dx := float32(p[0])
|
|
dy := float32(p[1])
|
|
crf := float32(c[0]) / 0xff
|
|
cgf := float32(c[1]) / 0xff
|
|
cbf := float32(c[2]) / 0xff
|
|
caf := float32(c[3]) / 0xff
|
|
|
|
vs[graphics.VertexFloatCount*4*idx] = dx
|
|
vs[graphics.VertexFloatCount*4*idx+1] = dy
|
|
vs[graphics.VertexFloatCount*4*idx+2] = sx
|
|
vs[graphics.VertexFloatCount*4*idx+3] = sy
|
|
vs[graphics.VertexFloatCount*4*idx+4] = crf
|
|
vs[graphics.VertexFloatCount*4*idx+5] = cgf
|
|
vs[graphics.VertexFloatCount*4*idx+6] = cbf
|
|
vs[graphics.VertexFloatCount*4*idx+7] = caf
|
|
vs[graphics.VertexFloatCount*4*idx+8] = dx + 1
|
|
vs[graphics.VertexFloatCount*4*idx+9] = dy
|
|
vs[graphics.VertexFloatCount*4*idx+10] = sx + 1
|
|
vs[graphics.VertexFloatCount*4*idx+11] = sy
|
|
vs[graphics.VertexFloatCount*4*idx+12] = crf
|
|
vs[graphics.VertexFloatCount*4*idx+13] = cgf
|
|
vs[graphics.VertexFloatCount*4*idx+14] = cbf
|
|
vs[graphics.VertexFloatCount*4*idx+15] = caf
|
|
vs[graphics.VertexFloatCount*4*idx+16] = dx
|
|
vs[graphics.VertexFloatCount*4*idx+17] = dy + 1
|
|
vs[graphics.VertexFloatCount*4*idx+18] = sx
|
|
vs[graphics.VertexFloatCount*4*idx+19] = sy + 1
|
|
vs[graphics.VertexFloatCount*4*idx+20] = crf
|
|
vs[graphics.VertexFloatCount*4*idx+21] = cgf
|
|
vs[graphics.VertexFloatCount*4*idx+22] = cbf
|
|
vs[graphics.VertexFloatCount*4*idx+23] = caf
|
|
vs[graphics.VertexFloatCount*4*idx+24] = dx + 1
|
|
vs[graphics.VertexFloatCount*4*idx+25] = dy + 1
|
|
vs[graphics.VertexFloatCount*4*idx+26] = sx + 1
|
|
vs[graphics.VertexFloatCount*4*idx+27] = sy + 1
|
|
vs[graphics.VertexFloatCount*4*idx+28] = crf
|
|
vs[graphics.VertexFloatCount*4*idx+29] = cgf
|
|
vs[graphics.VertexFloatCount*4*idx+30] = cbf
|
|
vs[graphics.VertexFloatCount*4*idx+31] = caf
|
|
|
|
is[6*idx] = uint16(4 * idx)
|
|
is[6*idx+1] = uint16(4*idx + 1)
|
|
is[6*idx+2] = uint16(4*idx + 2)
|
|
is[6*idx+3] = uint16(4*idx + 1)
|
|
is[6*idx+4] = uint16(4*idx + 2)
|
|
is[6*idx+5] = uint16(4*idx + 3)
|
|
|
|
idx++
|
|
}
|
|
i.dotsCache = nil
|
|
|
|
srcs := [graphics.ShaderImageCount]*mipmap.Mipmap{emptyImage.mipmap}
|
|
dr := graphicsdriver.Region{
|
|
X: 0,
|
|
Y: 0,
|
|
Width: float32(i.width),
|
|
Height: float32(i.height),
|
|
}
|
|
i.mipmap.DrawTriangles(srcs, vs, is, affine.ColorMIdentity{}, graphicsdriver.CompositeModeCopy, graphicsdriver.FilterNearest, graphicsdriver.AddressUnsafe, dr, graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, nil, nil, false, true)
|
|
}
|
|
|
|
func DumpImages(dir string) (string, error) {
|
|
return theUI.dumpImages(dir)
|
|
}
|
|
|
|
var (
|
|
emptyImage = NewImage(3, 3, atlas.ImageTypeRegular)
|
|
)
|
|
|
|
func init() {
|
|
pix := make([]byte, 4*emptyImage.width*emptyImage.height)
|
|
for i := range pix {
|
|
pix[i] = 0xff
|
|
}
|
|
// As emptyImage is used at Fill, use WritePixels instead.
|
|
emptyImage.WritePixels(pix, 0, 0, emptyImage.width, emptyImage.height)
|
|
}
|
|
|
|
func (i *Image) clear() {
|
|
i.Fill(0, 0, 0, 0, 0, 0, i.width, i.height)
|
|
}
|
|
|
|
func (i *Image) Fill(r, g, b, a float32, x, y, width, height int) {
|
|
dstRegion := graphicsdriver.Region{
|
|
X: float32(x),
|
|
Y: float32(y),
|
|
Width: float32(width),
|
|
Height: float32(height),
|
|
}
|
|
|
|
vs := graphics.QuadVertices(
|
|
1, 1, float32(emptyImage.width-1), float32(emptyImage.height-1),
|
|
float32(i.width), 0, 0, float32(i.height), 0, 0,
|
|
r, g, b, a)
|
|
is := graphics.QuadIndices()
|
|
|
|
srcs := [graphics.ShaderImageCount]*Image{emptyImage}
|
|
|
|
i.DrawTriangles(srcs, vs, is, affine.ColorMIdentity{}, graphicsdriver.CompositeModeCopy, graphicsdriver.FilterNearest, graphicsdriver.AddressUnsafe, dstRegion, graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, nearestShader, nil, false, true)
|
|
}
|