mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
307 lines
7.7 KiB
Go
307 lines
7.7 KiB
Go
// Copyright 2018 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 opengl
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/hajimehoshi/ebiten/internal/affine"
|
|
"github.com/hajimehoshi/ebiten/internal/driver"
|
|
"github.com/hajimehoshi/ebiten/internal/graphics"
|
|
"github.com/hajimehoshi/ebiten/internal/shaderir"
|
|
"github.com/hajimehoshi/ebiten/internal/thread"
|
|
)
|
|
|
|
var theGraphics Graphics
|
|
|
|
func Get() *Graphics {
|
|
return &theGraphics
|
|
}
|
|
|
|
type Graphics struct {
|
|
state openGLState
|
|
context context
|
|
|
|
nextImageID driver.ImageID
|
|
images map[driver.ImageID]*Image
|
|
|
|
nextShaderID driver.ShaderID
|
|
shaders map[driver.ShaderID]*Shader
|
|
|
|
// drawCalled is true just after Draw is called. This holds true until ReplacePixels is called.
|
|
drawCalled bool
|
|
}
|
|
|
|
func (g *Graphics) SetThread(thread *thread.Thread) {
|
|
g.context.t = thread
|
|
}
|
|
|
|
func (g *Graphics) Begin() {
|
|
// Do nothing.
|
|
}
|
|
|
|
func (g *Graphics) End() {
|
|
// Call glFlush to prevent black flicking (especially on Android (#226) and iOS).
|
|
// TODO: examples/sprites worked without this. Is this really needed?
|
|
g.context.flush()
|
|
}
|
|
|
|
func (g *Graphics) SetTransparent(transparent bool) {
|
|
// Do nothings.
|
|
}
|
|
|
|
func (g *Graphics) checkSize(width, height int) {
|
|
if width < 1 {
|
|
panic(fmt.Sprintf("opengl: width (%d) must be equal or more than %d", width, 1))
|
|
}
|
|
if height < 1 {
|
|
panic(fmt.Sprintf("opengl: height (%d) must be equal or more than %d", height, 1))
|
|
}
|
|
m := g.context.getMaxTextureSize()
|
|
if width > m {
|
|
panic(fmt.Sprintf("opengl: width (%d) must be less than or equal to %d", width, m))
|
|
}
|
|
if height > m {
|
|
panic(fmt.Sprintf("opengl: height (%d) must be less than or equal to %d", height, m))
|
|
}
|
|
}
|
|
|
|
func (g *Graphics) genNextImageID() driver.ImageID {
|
|
id := g.nextImageID
|
|
g.nextImageID++
|
|
return id
|
|
}
|
|
|
|
func (g *Graphics) genNextShaderID() driver.ShaderID {
|
|
id := g.nextShaderID
|
|
g.nextShaderID++
|
|
return id
|
|
}
|
|
|
|
func (g *Graphics) NewImage(width, height int) (driver.Image, error) {
|
|
i := &Image{
|
|
id: g.genNextImageID(),
|
|
graphics: g,
|
|
width: width,
|
|
height: height,
|
|
}
|
|
w := graphics.InternalImageSize(width)
|
|
h := graphics.InternalImageSize(height)
|
|
g.checkSize(w, h)
|
|
t, err := g.context.newTexture(w, h)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
i.textureNative = t
|
|
g.addImage(i)
|
|
return i, nil
|
|
}
|
|
|
|
func (g *Graphics) NewScreenFramebufferImage(width, height int) (driver.Image, error) {
|
|
g.checkSize(width, height)
|
|
i := &Image{
|
|
id: g.genNextImageID(),
|
|
graphics: g,
|
|
width: width,
|
|
height: height,
|
|
screen: true,
|
|
}
|
|
g.addImage(i)
|
|
return i, nil
|
|
}
|
|
|
|
func (g *Graphics) addImage(img *Image) {
|
|
if g.images == nil {
|
|
g.images = map[driver.ImageID]*Image{}
|
|
}
|
|
if _, ok := g.images[img.id]; ok {
|
|
panic(fmt.Sprintf("opengl: image ID %d was already registered", img.id))
|
|
}
|
|
g.images[img.id] = img
|
|
}
|
|
|
|
func (g *Graphics) removeImage(img *Image) {
|
|
delete(g.images, img.id)
|
|
}
|
|
|
|
// Reset resets or initializes the current OpenGL state.
|
|
func (g *Graphics) Reset() error {
|
|
return g.state.reset(&g.context)
|
|
}
|
|
|
|
func (g *Graphics) SetVertices(vertices []float32, indices []uint16) {
|
|
// Note that the vertices passed to BufferSubData is not under GC management
|
|
// in opengl package due to unsafe-way.
|
|
// See BufferSubData in context_mobile.go.
|
|
g.context.arrayBufferSubData(vertices)
|
|
g.context.elementArrayBufferSubData(indices)
|
|
}
|
|
|
|
func (g *Graphics) Draw(dst, src driver.ImageID, indexLen int, indexOffset int, mode driver.CompositeMode, colorM *affine.ColorM, filter driver.Filter, address driver.Address, sourceRegion driver.Region) error {
|
|
// TODO: Use sourceRegion.
|
|
|
|
destination := g.images[dst]
|
|
source := g.images[src]
|
|
|
|
g.drawCalled = true
|
|
|
|
if err := destination.setViewport(); err != nil {
|
|
return err
|
|
}
|
|
g.context.blendFunc(mode)
|
|
|
|
program := g.state.programs[programKey{
|
|
useColorM: colorM != nil,
|
|
filter: filter,
|
|
address: address,
|
|
}]
|
|
|
|
uniforms := []uniformVariable{}
|
|
|
|
vw := destination.framebuffer.width
|
|
vh := destination.framebuffer.height
|
|
uniforms = append(uniforms, uniformVariable{
|
|
name: "viewport_size",
|
|
value: []float32{float32(vw), float32(vh)},
|
|
}, uniformVariable{
|
|
name: "source_region",
|
|
value: []float32{
|
|
sourceRegion.X,
|
|
sourceRegion.Y,
|
|
sourceRegion.X + sourceRegion.Width,
|
|
sourceRegion.Y + sourceRegion.Height,
|
|
},
|
|
})
|
|
|
|
if colorM != nil {
|
|
// ColorM's elements are immutable. It's OK to hold the reference without copying.
|
|
esBody, esTranslate := colorM.UnsafeElements()
|
|
uniforms = append(uniforms, uniformVariable{
|
|
name: "color_matrix_body",
|
|
value: esBody,
|
|
}, uniformVariable{
|
|
name: "color_matrix_translation",
|
|
value: esTranslate,
|
|
})
|
|
}
|
|
|
|
if filter != driver.FilterNearest {
|
|
srcW, srcH := source.width, source.height
|
|
sw := graphics.InternalImageSize(srcW)
|
|
sh := graphics.InternalImageSize(srcH)
|
|
uniforms = append(uniforms, uniformVariable{
|
|
name: "source_size",
|
|
value: []float32{float32(sw), float32(sh)},
|
|
})
|
|
}
|
|
|
|
if filter == driver.FilterScreen {
|
|
scale := float32(destination.width) / float32(source.width)
|
|
uniforms = append(uniforms, uniformVariable{
|
|
name: "scale",
|
|
value: scale,
|
|
})
|
|
}
|
|
|
|
if err := g.useProgram(program, uniforms, []textureNative{source.textureNative}); err != nil {
|
|
return err
|
|
}
|
|
|
|
g.context.drawElements(indexLen, indexOffset*2) // 2 is uint16 size in bytes
|
|
|
|
// glFlush() might be necessary at least on MacBook Pro (a smilar problem at #419),
|
|
// but basically this pass the tests (esp. TestImageTooManyFill).
|
|
// As glFlush() causes performance problems, this should be avoided as much as possible.
|
|
// Let's wait and see, and file a new issue when this problem is newly foung.
|
|
return nil
|
|
}
|
|
|
|
func (g *Graphics) SetVsyncEnabled(enabled bool) {
|
|
// Do nothing
|
|
}
|
|
|
|
func (g *Graphics) FramebufferYDirection() driver.YDirection {
|
|
return driver.Upward
|
|
}
|
|
|
|
func (g *Graphics) NeedsRestoring() bool {
|
|
return g.context.needsRestoring()
|
|
}
|
|
|
|
func (g *Graphics) IsGL() bool {
|
|
return true
|
|
}
|
|
|
|
func (g *Graphics) HasHighPrecisionFloat() bool {
|
|
return g.context.hasHighPrecisionFloat()
|
|
}
|
|
|
|
func (g *Graphics) MaxImageSize() int {
|
|
return g.context.getMaxTextureSize()
|
|
}
|
|
|
|
func (g *Graphics) NewShader(program *shaderir.Program) (driver.Shader, error) {
|
|
s, err := NewShader(g.genNextShaderID(), g, program)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
g.addShader(s)
|
|
return s, nil
|
|
}
|
|
|
|
func (g *Graphics) addShader(shader *Shader) {
|
|
if g.shaders == nil {
|
|
g.shaders = map[driver.ShaderID]*Shader{}
|
|
}
|
|
if _, ok := g.shaders[shader.id]; ok {
|
|
panic(fmt.Sprintf("opengl: shader ID %d was already registered", shader.id))
|
|
}
|
|
g.shaders[shader.id] = shader
|
|
}
|
|
|
|
func (g *Graphics) removeShader(shader *Shader) {
|
|
delete(g.shaders, shader.id)
|
|
}
|
|
|
|
func (g *Graphics) DrawShader(dst driver.ImageID, shader driver.ShaderID, indexLen int, indexOffset int, mode driver.CompositeMode, uniforms []interface{}, textures []driver.ImageID) error {
|
|
d := g.images[dst]
|
|
s := g.shaders[shader]
|
|
|
|
g.drawCalled = true
|
|
|
|
if err := d.setViewport(); err != nil {
|
|
return err
|
|
}
|
|
g.context.blendFunc(mode)
|
|
|
|
us := make([]uniformVariable, len(uniforms))
|
|
for k, v := range uniforms {
|
|
us[k].name = fmt.Sprintf("U%d", k)
|
|
us[k].value = v
|
|
}
|
|
|
|
ts := make([]textureNative, len(textures))
|
|
for k, v := range textures {
|
|
ts[k] = g.images[v].textureNative
|
|
}
|
|
|
|
if err := g.useProgram(s.p, us, ts); err != nil {
|
|
return err
|
|
}
|
|
g.context.drawElements(indexLen, indexOffset*2) // 2 is uint16 size in bytes
|
|
|
|
return nil
|
|
}
|