mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 13:22:19 +02:00
151 lines
4.1 KiB
Go
151 lines
4.1 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/thread"
|
|
)
|
|
|
|
var theGraphics Graphics
|
|
|
|
func Get() *Graphics {
|
|
return &theGraphics
|
|
}
|
|
|
|
type Graphics struct {
|
|
state openGLState
|
|
context context
|
|
|
|
// 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) NewImage(width, height int) (driver.Image, error) {
|
|
i := &Image{
|
|
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
|
|
return i, nil
|
|
}
|
|
|
|
func (g *Graphics) NewScreenFramebufferImage(width, height int) (driver.Image, error) {
|
|
g.checkSize(width, height)
|
|
i := &Image{
|
|
graphics: g,
|
|
width: width,
|
|
height: height,
|
|
screen: true,
|
|
}
|
|
return i, nil
|
|
}
|
|
|
|
// 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(indexLen int, indexOffset int, mode driver.CompositeMode, colorM *affine.ColorM, filter driver.Filter, address driver.Address) error {
|
|
g.drawCalled = true
|
|
if err := g.useProgram(mode, colorM, filter, address); 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()
|
|
}
|