mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-27 04:08:53 +01:00
459 lines
13 KiB
Go
459 lines
13 KiB
Go
// Copyright 2014 Hajime Hoshi
|
|
//
|
|
// 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.
|
|
|
|
// +build android ios
|
|
|
|
package opengl
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
|
|
"github.com/hajimehoshi/ebiten/v2/internal/driver"
|
|
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/opengl/gles"
|
|
"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
|
|
)
|
|
|
|
type (
|
|
textureNative uint32
|
|
framebufferNative uint32
|
|
shader uint32
|
|
program uint32
|
|
buffer uint32
|
|
)
|
|
|
|
func (t textureNative) equal(rhs textureNative) bool {
|
|
return t == rhs
|
|
}
|
|
|
|
func (f framebufferNative) equal(rhs framebufferNative) bool {
|
|
return f == rhs
|
|
}
|
|
|
|
func (s shader) equal(rhs shader) bool {
|
|
return s == rhs
|
|
}
|
|
|
|
func (b buffer) equal(rhs buffer) bool {
|
|
return b == rhs
|
|
}
|
|
|
|
func (p program) equal(rhs program) bool {
|
|
return p == rhs
|
|
}
|
|
|
|
var InvalidTexture textureNative
|
|
|
|
type (
|
|
uniformLocation int32
|
|
attribLocation int32
|
|
)
|
|
|
|
func (u uniformLocation) equal(rhs uniformLocation) bool {
|
|
return u == rhs
|
|
}
|
|
|
|
type programID uint32
|
|
|
|
const (
|
|
invalidTexture = 0
|
|
invalidFramebuffer = (1 << 32) - 1
|
|
invalidUniform = -1
|
|
)
|
|
|
|
func getProgramID(p program) programID {
|
|
return programID(p)
|
|
}
|
|
|
|
const (
|
|
zero = operation(gles.ZERO)
|
|
one = operation(gles.ONE)
|
|
srcAlpha = operation(gles.SRC_ALPHA)
|
|
dstAlpha = operation(gles.DST_ALPHA)
|
|
oneMinusSrcAlpha = operation(gles.ONE_MINUS_SRC_ALPHA)
|
|
oneMinusDstAlpha = operation(gles.ONE_MINUS_DST_ALPHA)
|
|
dstColor = operation(gles.DST_COLOR)
|
|
)
|
|
|
|
type contextImpl struct {
|
|
ctx gles.Context
|
|
}
|
|
|
|
func (c *context) reset() error {
|
|
c.locationCache = newLocationCache()
|
|
c.lastTexture = invalidTexture
|
|
c.lastFramebuffer = invalidFramebuffer
|
|
c.lastViewportWidth = 0
|
|
c.lastViewportHeight = 0
|
|
c.lastCompositeMode = driver.CompositeModeUnknown
|
|
c.ctx.Enable(gles.BLEND)
|
|
c.ctx.Enable(gles.SCISSOR_TEST)
|
|
c.blendFunc(driver.CompositeModeSourceOver)
|
|
f := make([]int32, 1)
|
|
c.ctx.GetIntegerv(f, gles.FRAMEBUFFER_BINDING)
|
|
c.screenFramebuffer = framebufferNative(f[0])
|
|
// TODO: Need to update screenFramebufferWidth/Height?
|
|
return nil
|
|
}
|
|
|
|
func (c *context) blendFunc(mode driver.CompositeMode) {
|
|
if c.lastCompositeMode == mode {
|
|
return
|
|
}
|
|
c.lastCompositeMode = mode
|
|
s, d := mode.Operations()
|
|
s2, d2 := convertOperation(s), convertOperation(d)
|
|
c.ctx.BlendFunc(uint32(s2), uint32(d2))
|
|
}
|
|
|
|
func (c *context) scissor(x, y, width, height int) {
|
|
c.ctx.Scissor(int32(x), int32(y), int32(width), int32(height))
|
|
}
|
|
|
|
func (c *context) newTexture(width, height int) (textureNative, error) {
|
|
t := c.ctx.GenTextures(1)[0]
|
|
if t <= 0 {
|
|
return 0, errors.New("opengl: creating texture failed")
|
|
}
|
|
c.ctx.PixelStorei(gles.UNPACK_ALIGNMENT, 4)
|
|
c.bindTexture(textureNative(t))
|
|
|
|
c.ctx.TexParameteri(gles.TEXTURE_2D, gles.TEXTURE_MAG_FILTER, gles.NEAREST)
|
|
c.ctx.TexParameteri(gles.TEXTURE_2D, gles.TEXTURE_MIN_FILTER, gles.NEAREST)
|
|
c.ctx.TexParameteri(gles.TEXTURE_2D, gles.TEXTURE_WRAP_S, gles.CLAMP_TO_EDGE)
|
|
c.ctx.TexParameteri(gles.TEXTURE_2D, gles.TEXTURE_WRAP_T, gles.CLAMP_TO_EDGE)
|
|
c.ctx.TexImage2D(gles.TEXTURE_2D, 0, gles.RGBA, int32(width), int32(height), gles.RGBA, gles.UNSIGNED_BYTE, nil)
|
|
|
|
return textureNative(t), nil
|
|
}
|
|
|
|
func (c *context) bindFramebufferImpl(f framebufferNative) {
|
|
c.ctx.BindFramebuffer(gles.FRAMEBUFFER, uint32(f))
|
|
}
|
|
|
|
func (c *context) framebufferPixels(f *framebuffer, width, height int) []byte {
|
|
c.ctx.Flush()
|
|
|
|
c.bindFramebuffer(f.native)
|
|
|
|
pixels := make([]byte, 4*width*height)
|
|
c.ctx.ReadPixels(pixels, 0, 0, int32(width), int32(height), gles.RGBA, gles.UNSIGNED_BYTE)
|
|
return pixels
|
|
}
|
|
|
|
func (c *context) framebufferPixelsToBuffer(f *framebuffer, buffer buffer, width, height int) {
|
|
c.ctx.Flush()
|
|
|
|
c.bindFramebuffer(f.native)
|
|
|
|
c.ctx.BindBuffer(gles.PIXEL_PACK_BUFFER, uint32(buffer))
|
|
c.ctx.ReadPixels(nil, 0, 0, int32(width), int32(height), gles.RGBA, gles.UNSIGNED_BYTE)
|
|
c.ctx.BindBuffer(gles.PIXEL_PACK_BUFFER, 0)
|
|
}
|
|
|
|
func (c *context) activeTexture(idx int) {
|
|
c.ctx.ActiveTexture(uint32(gles.TEXTURE0 + idx))
|
|
}
|
|
|
|
func (c *context) bindTextureImpl(t textureNative) {
|
|
c.ctx.BindTexture(gles.TEXTURE_2D, uint32(t))
|
|
}
|
|
|
|
func (c *context) deleteTexture(t textureNative) {
|
|
if !c.ctx.IsTexture(uint32(t)) {
|
|
return
|
|
}
|
|
if c.lastTexture == t {
|
|
c.lastTexture = invalidTexture
|
|
}
|
|
c.ctx.DeleteTextures([]uint32{uint32(t)})
|
|
}
|
|
|
|
func (c *context) isTexture(t textureNative) bool {
|
|
return c.ctx.IsTexture(uint32(t))
|
|
}
|
|
|
|
func (c *context) newFramebuffer(texture textureNative) (framebufferNative, error) {
|
|
f := c.ctx.GenFramebuffers(1)[0]
|
|
if f <= 0 {
|
|
return 0, fmt.Errorf("opengl: creating framebuffer failed: the returned value is not positive but %d", f)
|
|
}
|
|
c.bindFramebuffer(framebufferNative(f))
|
|
|
|
c.ctx.FramebufferTexture2D(gles.FRAMEBUFFER, gles.COLOR_ATTACHMENT0, gles.TEXTURE_2D, uint32(texture), 0)
|
|
s := c.ctx.CheckFramebufferStatus(gles.FRAMEBUFFER)
|
|
if s != gles.FRAMEBUFFER_COMPLETE {
|
|
if s != 0 {
|
|
return 0, fmt.Errorf("opengl: creating framebuffer failed: %v", s)
|
|
}
|
|
if e := c.ctx.GetError(); e != gles.NO_ERROR {
|
|
return 0, fmt.Errorf("opengl: creating framebuffer failed: (glGetError) %d", e)
|
|
}
|
|
return 0, fmt.Errorf("opengl: creating framebuffer failed: unknown error")
|
|
}
|
|
return framebufferNative(f), nil
|
|
}
|
|
|
|
func (c *context) setViewportImpl(width, height int) {
|
|
c.ctx.Viewport(0, 0, int32(width), int32(height))
|
|
}
|
|
|
|
func (c *context) deleteFramebuffer(f framebufferNative) {
|
|
if !c.ctx.IsFramebuffer(uint32(f)) {
|
|
return
|
|
}
|
|
// If a framebuffer to be deleted is bound, a newly bound framebuffer
|
|
// will be a default framebuffer.
|
|
// https://www.khronos.org/opengles/sdk/docs/man/xhtml/glDeleteFramebuffers.xml
|
|
if c.lastFramebuffer == f {
|
|
c.lastFramebuffer = invalidFramebuffer
|
|
c.lastViewportWidth = 0
|
|
c.lastViewportHeight = 0
|
|
}
|
|
c.ctx.DeleteFramebuffers([]uint32{uint32(f)})
|
|
}
|
|
|
|
func (c *context) newVertexShader(source string) (shader, error) {
|
|
return c.newShader(gles.VERTEX_SHADER, source)
|
|
}
|
|
|
|
func (c *context) newFragmentShader(source string) (shader, error) {
|
|
return c.newShader(gles.FRAGMENT_SHADER, source)
|
|
}
|
|
|
|
func (c *context) newShader(shaderType uint32, source string) (shader, error) {
|
|
s := c.ctx.CreateShader(shaderType)
|
|
if s == 0 {
|
|
return 0, fmt.Errorf("opengl: glCreateShader failed: shader type: %d", shaderType)
|
|
}
|
|
c.ctx.ShaderSource(s, source)
|
|
c.ctx.CompileShader(s)
|
|
|
|
v := make([]int32, 1)
|
|
c.ctx.GetShaderiv(v, s, gles.COMPILE_STATUS)
|
|
if v[0] == gles.FALSE {
|
|
log := c.ctx.GetShaderInfoLog(s)
|
|
return 0, fmt.Errorf("opengl: shader compile failed: %s", log)
|
|
}
|
|
return shader(s), nil
|
|
}
|
|
|
|
func (c *context) deleteShader(s shader) {
|
|
c.ctx.DeleteShader(uint32(s))
|
|
}
|
|
|
|
func (c *context) newProgram(shaders []shader, attributes []string) (program, error) {
|
|
p := c.ctx.CreateProgram()
|
|
if p == 0 {
|
|
return 0, errors.New("opengl: glCreateProgram failed")
|
|
}
|
|
|
|
for _, shader := range shaders {
|
|
c.ctx.AttachShader(p, uint32(shader))
|
|
}
|
|
|
|
for i, name := range attributes {
|
|
c.ctx.BindAttribLocation(p, uint32(i), name)
|
|
}
|
|
|
|
c.ctx.LinkProgram(p)
|
|
v := make([]int32, 1)
|
|
c.ctx.GetProgramiv(v, p, gles.LINK_STATUS)
|
|
if v[0] == gles.FALSE {
|
|
info := c.ctx.GetProgramInfoLog(p)
|
|
return 0, fmt.Errorf("opengl: program error: %s", info)
|
|
}
|
|
return program(p), nil
|
|
}
|
|
|
|
func (c *context) useProgram(p program) {
|
|
c.ctx.UseProgram(uint32(p))
|
|
}
|
|
|
|
func (c *context) deleteProgram(p program) {
|
|
if !c.ctx.IsProgram(uint32(p)) {
|
|
return
|
|
}
|
|
c.ctx.DeleteProgram(uint32(p))
|
|
}
|
|
|
|
func (c *context) getUniformLocationImpl(p program, location string) uniformLocation {
|
|
u := uniformLocation(c.ctx.GetUniformLocation(uint32(p), location))
|
|
return u
|
|
}
|
|
|
|
func (c *context) uniformInt(p program, location string, v int) bool {
|
|
l := c.locationCache.GetUniformLocation(c, p, location)
|
|
if l == invalidUniform {
|
|
return false
|
|
}
|
|
c.ctx.Uniform1i(int32(l), int32(v))
|
|
return true
|
|
}
|
|
|
|
func (c *context) uniformFloat(p program, location string, v float32) bool {
|
|
l := c.locationCache.GetUniformLocation(c, p, location)
|
|
if l == invalidUniform {
|
|
return false
|
|
}
|
|
c.ctx.Uniform1f(int32(l), v)
|
|
return true
|
|
}
|
|
|
|
func (c *context) uniformFloats(p program, location string, v []float32, typ shaderir.Type) bool {
|
|
l := c.locationCache.GetUniformLocation(c, p, location)
|
|
if l == invalidUniform {
|
|
return false
|
|
}
|
|
|
|
base := typ.Main
|
|
if base == shaderir.Array {
|
|
base = typ.Sub[0].Main
|
|
}
|
|
|
|
switch base {
|
|
case shaderir.Float:
|
|
c.ctx.Uniform1fv(int32(l), v)
|
|
case shaderir.Vec2:
|
|
c.ctx.Uniform2fv(int32(l), v)
|
|
case shaderir.Vec3:
|
|
c.ctx.Uniform3fv(int32(l), v)
|
|
case shaderir.Vec4:
|
|
c.ctx.Uniform4fv(int32(l), v)
|
|
case shaderir.Mat2:
|
|
c.ctx.UniformMatrix2fv(int32(l), false, v)
|
|
case shaderir.Mat3:
|
|
c.ctx.UniformMatrix3fv(int32(l), false, v)
|
|
case shaderir.Mat4:
|
|
c.ctx.UniformMatrix4fv(int32(l), false, v)
|
|
default:
|
|
panic(fmt.Sprintf("opengl: unexpected type: %s", typ.String()))
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (c *context) vertexAttribPointer(index int, size int, stride int, offset int) {
|
|
c.ctx.VertexAttribPointer(uint32(index), int32(size), gles.FLOAT, false, int32(stride), offset)
|
|
}
|
|
|
|
func (c *context) enableVertexAttribArray(index int) {
|
|
c.ctx.EnableVertexAttribArray(uint32(index))
|
|
}
|
|
|
|
func (c *context) disableVertexAttribArray(index int) {
|
|
c.ctx.DisableVertexAttribArray(uint32(index))
|
|
}
|
|
|
|
func (c *context) newArrayBuffer(size int) buffer {
|
|
b := c.ctx.GenBuffers(1)[0]
|
|
c.ctx.BindBuffer(gles.ARRAY_BUFFER, b)
|
|
c.ctx.BufferData(gles.ARRAY_BUFFER, size, nil, gles.DYNAMIC_DRAW)
|
|
return buffer(b)
|
|
}
|
|
|
|
func (c *context) newElementArrayBuffer(size int) buffer {
|
|
b := c.ctx.GenBuffers(1)[0]
|
|
c.ctx.BindBuffer(gles.ELEMENT_ARRAY_BUFFER, b)
|
|
c.ctx.BufferData(gles.ELEMENT_ARRAY_BUFFER, size, nil, gles.DYNAMIC_DRAW)
|
|
return buffer(b)
|
|
}
|
|
|
|
func (c *context) bindArrayBuffer(b buffer) {
|
|
c.ctx.BindBuffer(gles.ARRAY_BUFFER, uint32(b))
|
|
}
|
|
|
|
func (c *context) bindElementArrayBuffer(b buffer) {
|
|
c.ctx.BindBuffer(gles.ELEMENT_ARRAY_BUFFER, uint32(b))
|
|
}
|
|
|
|
func (c *context) arrayBufferSubData(data []float32) {
|
|
c.ctx.BufferSubData(gles.ARRAY_BUFFER, 0, float32sToBytes(data))
|
|
}
|
|
|
|
func (c *context) elementArrayBufferSubData(data []uint16) {
|
|
c.ctx.BufferSubData(gles.ELEMENT_ARRAY_BUFFER, 0, uint16sToBytes(data))
|
|
}
|
|
|
|
func (c *context) deleteBuffer(b buffer) {
|
|
c.ctx.DeleteBuffers([]uint32{uint32(b)})
|
|
}
|
|
|
|
func (c *context) drawElements(len int, offsetInBytes int) {
|
|
c.ctx.DrawElements(gles.TRIANGLES, int32(len), gles.UNSIGNED_SHORT, offsetInBytes)
|
|
}
|
|
|
|
func (c *context) maxTextureSizeImpl() int {
|
|
v := make([]int32, 1)
|
|
c.ctx.GetIntegerv(v, gles.MAX_TEXTURE_SIZE)
|
|
return int(v[0])
|
|
}
|
|
|
|
func (c *context) getShaderPrecisionFormatPrecision() int {
|
|
_, _, p := c.ctx.GetShaderPrecisionFormat(gles.FRAGMENT_SHADER, gles.HIGH_FLOAT)
|
|
return p
|
|
}
|
|
|
|
func (c *context) flush() {
|
|
c.ctx.Flush()
|
|
}
|
|
|
|
func (c *context) needsRestoring() bool {
|
|
return true
|
|
}
|
|
|
|
func (c *context) canUsePBO() bool {
|
|
// On Android, using PBO might slow the applications, especially when coming back from the context lost.
|
|
// Let's not use PBO until we find a good solution.
|
|
return false
|
|
}
|
|
|
|
func (c *context) texSubImage2D(t textureNative, width, height int, args []*driver.ReplacePixelsArgs) {
|
|
c.bindTexture(t)
|
|
for _, a := range args {
|
|
c.ctx.TexSubImage2D(gles.TEXTURE_2D, 0, int32(a.X), int32(a.Y), int32(a.Width), int32(a.Height), gles.RGBA, gles.UNSIGNED_BYTE, a.Pixels)
|
|
}
|
|
}
|
|
|
|
func (c *context) newPixelBufferObject(width, height int) buffer {
|
|
b := c.ctx.GenBuffers(1)[0]
|
|
c.ctx.BindBuffer(gles.PIXEL_UNPACK_BUFFER, b)
|
|
c.ctx.BufferData(gles.PIXEL_UNPACK_BUFFER, 4*width*height, nil, gles.STREAM_DRAW)
|
|
c.ctx.BindBuffer(gles.PIXEL_UNPACK_BUFFER, 0)
|
|
return buffer(b)
|
|
}
|
|
|
|
func (c *context) replacePixelsWithPBO(buffer buffer, t textureNative, width, height int, args []*driver.ReplacePixelsArgs) {
|
|
// This implementation is not used yet so far. See the comment at canUsePBO.
|
|
|
|
c.bindTexture(t)
|
|
c.ctx.BindBuffer(gles.PIXEL_UNPACK_BUFFER, uint32(buffer))
|
|
|
|
stride := 4 * width
|
|
for _, a := range args {
|
|
offset := 4 * (a.Y*width + a.X)
|
|
for j := 0; j < a.Height; j++ {
|
|
c.ctx.BufferSubData(gles.PIXEL_UNPACK_BUFFER, offset+stride*j, a.Pixels[4*a.Width*j:4*a.Width*(j+1)])
|
|
}
|
|
}
|
|
|
|
c.ctx.TexSubImage2D(gles.TEXTURE_2D, 0, 0, 0, int32(width), int32(height), gles.RGBA, gles.UNSIGNED_BYTE, nil)
|
|
c.ctx.BindBuffer(gles.PIXEL_UNPACK_BUFFER, 0)
|
|
}
|
|
|
|
func (c *context) getBufferSubData(buffer buffer, width, height int) []byte {
|
|
// gl.GetBufferSubData doesn't exist on OpenGL ES 2 and 3.
|
|
// As PBO is not used in mobiles, leave this unimplemented so far.
|
|
panic("opengl: getBufferSubData is not implemented for mobiles")
|
|
}
|