2014-12-30 19:04:52 +01:00
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// Copyright 2014 Hajime Hoshi
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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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2017-01-25 17:32:33 +01:00
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// +build android ios
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2014-12-31 10:23:18 +01:00
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2014-12-30 19:04:52 +01:00
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package opengl
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import (
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2014-12-31 06:57:51 +01:00
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"errors"
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2014-12-31 07:11:19 +01:00
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"fmt"
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2015-06-20 18:33:28 +02:00
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2020-10-03 19:35:13 +02:00
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"github.com/hajimehoshi/ebiten/v2/internal/driver"
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2020-10-18 11:09:10 +02:00
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/opengl/gles"
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2020-10-03 19:35:13 +02:00
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"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
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2014-12-30 19:04:52 +01:00
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)
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2017-12-11 15:07:01 +01:00
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type (
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2020-10-18 11:28:23 +02:00
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textureNative uint32
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framebufferNative uint32
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shader uint32
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program uint32
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buffer uint32
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2017-12-11 15:07:01 +01:00
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)
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2015-01-16 16:56:29 +01:00
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2019-12-18 16:03:35 +01:00
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func (t textureNative) equal(rhs textureNative) bool {
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return t == rhs
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}
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func (f framebufferNative) equal(rhs framebufferNative) bool {
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return f == rhs
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}
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func (s shader) equal(rhs shader) bool {
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return s == rhs
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}
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func (b buffer) equal(rhs buffer) bool {
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return b == rhs
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}
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func (p program) equal(rhs program) bool {
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return p == rhs
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}
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2018-11-04 11:46:20 +01:00
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var InvalidTexture textureNative
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2017-07-02 15:18:49 +02:00
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2017-12-11 15:07:01 +01:00
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type (
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2020-10-18 11:28:23 +02:00
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uniformLocation int32
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attribLocation int32
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2017-12-11 15:07:01 +01:00
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)
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2015-01-12 15:16:34 +01:00
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2019-12-18 16:03:35 +01:00
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func (u uniformLocation) equal(rhs uniformLocation) bool {
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return u == rhs
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}
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2016-02-26 18:41:38 +01:00
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type programID uint32
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2015-01-12 15:16:34 +01:00
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2020-10-18 11:28:23 +02:00
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const (
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invalidTexture = 0
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invalidFramebuffer = (1 << 32) - 1
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invalidUniform = -1
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2016-07-09 16:14:24 +02:00
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)
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2016-06-17 21:46:33 +02:00
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2018-10-29 17:52:59 +01:00
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func getProgramID(p program) programID {
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2020-10-18 11:28:23 +02:00
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return programID(p)
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2015-01-12 15:16:34 +01:00
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}
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2014-12-31 13:55:40 +01:00
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2018-12-25 17:51:04 +01:00
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const (
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2020-10-18 11:09:10 +02:00
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vertexShader = shaderType(gles.VERTEX_SHADER)
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fragmentShader = shaderType(gles.FRAGMENT_SHADER)
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arrayBuffer = bufferType(gles.ARRAY_BUFFER)
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elementArrayBuffer = bufferType(gles.ELEMENT_ARRAY_BUFFER)
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dynamicDraw = bufferUsage(gles.DYNAMIC_DRAW)
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short = dataType(gles.SHORT)
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float = dataType(gles.FLOAT)
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zero = operation(gles.ZERO)
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one = operation(gles.ONE)
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srcAlpha = operation(gles.SRC_ALPHA)
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dstAlpha = operation(gles.DST_ALPHA)
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oneMinusSrcAlpha = operation(gles.ONE_MINUS_SRC_ALPHA)
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oneMinusDstAlpha = operation(gles.ONE_MINUS_DST_ALPHA)
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dstColor = operation(gles.DST_COLOR)
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2018-12-25 17:51:04 +01:00
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)
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2016-07-03 11:11:37 +02:00
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2018-11-10 17:14:26 +01:00
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type contextImpl struct {
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2020-10-18 11:28:23 +02:00
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ctx gles.Context
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2016-07-03 18:25:35 +02:00
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}
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2018-11-10 17:14:26 +01:00
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func (c *context) reset() error {
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2016-06-09 18:19:10 +02:00
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c.locationCache = newLocationCache()
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2016-07-09 16:14:24 +02:00
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c.lastTexture = invalidTexture
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2016-06-17 21:46:33 +02:00
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c.lastFramebuffer = invalidFramebuffer
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2016-06-09 18:19:10 +02:00
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c.lastViewportWidth = 0
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c.lastViewportHeight = 0
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2019-06-25 17:43:09 +02:00
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c.lastCompositeMode = driver.CompositeModeUnknown
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2020-10-18 11:28:23 +02:00
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c.ctx.Enable(gles.BLEND)
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2020-11-07 11:14:06 +01:00
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c.ctx.Enable(gles.SCISSOR_TEST)
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2019-06-25 17:43:09 +02:00
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c.blendFunc(driver.CompositeModeSourceOver)
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2020-10-18 11:28:23 +02:00
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f := make([]int32, 1)
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c.ctx.GetIntegerv(f, gles.FRAMEBUFFER_BINDING)
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c.screenFramebuffer = framebufferNative(f[0])
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2016-06-18 12:55:04 +02:00
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// TODO: Need to update screenFramebufferWidth/Height?
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2016-06-17 23:25:40 +02:00
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return nil
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2016-06-09 18:19:10 +02:00
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}
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2019-06-25 17:43:09 +02:00
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func (c *context) blendFunc(mode driver.CompositeMode) {
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2016-05-07 12:12:19 +02:00
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if c.lastCompositeMode == mode {
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return
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2016-02-21 14:20:33 +01:00
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}
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2016-05-07 12:12:19 +02:00
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c.lastCompositeMode = mode
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2018-10-28 12:42:57 +01:00
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s, d := mode.Operations()
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s2, d2 := convertOperation(s), convertOperation(d)
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2020-10-18 11:28:23 +02:00
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c.ctx.BlendFunc(uint32(s2), uint32(d2))
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2016-02-21 14:20:33 +01:00
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}
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2020-11-07 11:14:06 +01:00
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func (c *context) scissor(x, y, width, height int) {
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c.ctx.Scissor(int32(x), int32(y), int32(width), int32(height))
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}
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2018-11-10 17:14:26 +01:00
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func (c *context) newTexture(width, height int) (textureNative, error) {
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2020-10-18 11:28:23 +02:00
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t := c.ctx.GenTextures(1)[0]
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if t <= 0 {
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return 0, errors.New("opengl: creating texture failed")
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2014-12-31 06:57:51 +01:00
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}
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2020-10-18 11:28:23 +02:00
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c.ctx.PixelStorei(gles.UNPACK_ALIGNMENT, 4)
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2018-11-04 11:46:20 +01:00
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c.bindTexture(textureNative(t))
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2014-12-31 06:57:51 +01:00
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2020-10-18 11:28:23 +02:00
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c.ctx.TexParameteri(gles.TEXTURE_2D, gles.TEXTURE_MAG_FILTER, gles.NEAREST)
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c.ctx.TexParameteri(gles.TEXTURE_2D, gles.TEXTURE_MIN_FILTER, gles.NEAREST)
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c.ctx.TexParameteri(gles.TEXTURE_2D, gles.TEXTURE_WRAP_S, gles.CLAMP_TO_EDGE)
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c.ctx.TexParameteri(gles.TEXTURE_2D, gles.TEXTURE_WRAP_T, gles.CLAMP_TO_EDGE)
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c.ctx.TexImage2D(gles.TEXTURE_2D, 0, gles.RGBA, int32(width), int32(height), gles.RGBA, gles.UNSIGNED_BYTE, nil)
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2014-12-31 06:57:51 +01:00
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2018-11-04 11:46:20 +01:00
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return textureNative(t), nil
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2014-12-31 06:57:51 +01:00
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}
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2014-12-31 07:22:15 +01:00
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2018-11-10 17:14:26 +01:00
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func (c *context) bindFramebufferImpl(f framebufferNative) {
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2020-10-18 11:28:23 +02:00
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c.ctx.BindFramebuffer(gles.FRAMEBUFFER, uint32(f))
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2016-05-31 19:33:31 +02:00
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}
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2020-10-12 17:39:45 +02:00
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func (c *context) framebufferPixels(f *framebuffer, width, height int) []byte {
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2020-10-18 11:28:23 +02:00
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c.ctx.Flush()
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2015-01-17 10:22:58 +01:00
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2018-11-04 09:28:33 +01:00
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c.bindFramebuffer(f.native)
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2015-01-17 10:22:58 +01:00
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2018-02-28 16:27:55 +01:00
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pixels := make([]byte, 4*width*height)
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2020-10-18 11:28:23 +02:00
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c.ctx.ReadPixels(pixels, 0, 0, int32(width), int32(height), gles.RGBA, gles.UNSIGNED_BYTE)
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2020-10-12 17:39:45 +02:00
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return pixels
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2014-12-31 10:23:18 +01:00
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}
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2020-08-15 08:11:56 +02:00
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func (c *context) framebufferPixelsToBuffer(f *framebuffer, buffer buffer, width, height int) {
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c.ctx.Flush()
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c.bindFramebuffer(f.native)
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c.ctx.BindBuffer(gles.PIXEL_PACK_BUFFER, uint32(buffer))
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c.ctx.ReadPixels(nil, 0, 0, int32(width), int32(height), gles.RGBA, gles.UNSIGNED_BYTE)
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c.ctx.BindBuffer(gles.PIXEL_PACK_BUFFER, 0)
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}
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2020-05-17 16:04:13 +02:00
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func (c *context) activeTexture(idx int) {
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2020-10-18 11:28:23 +02:00
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c.ctx.ActiveTexture(uint32(gles.TEXTURE0 + idx))
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2020-05-17 16:04:13 +02:00
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}
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2018-11-10 17:14:26 +01:00
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func (c *context) bindTextureImpl(t textureNative) {
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2020-10-18 11:28:23 +02:00
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c.ctx.BindTexture(gles.TEXTURE_2D, uint32(t))
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2014-12-31 10:23:18 +01:00
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}
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2018-11-10 17:14:26 +01:00
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func (c *context) deleteTexture(t textureNative) {
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2020-10-18 11:28:23 +02:00
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if !c.ctx.IsTexture(uint32(t)) {
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2016-06-12 16:19:01 +02:00
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return
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}
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2016-07-09 22:04:25 +02:00
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if c.lastTexture == t {
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c.lastTexture = invalidTexture
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}
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2020-10-18 11:28:23 +02:00
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c.ctx.DeleteTextures([]uint32{uint32(t)})
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2014-12-31 10:23:18 +01:00
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}
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2018-11-10 17:14:26 +01:00
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func (c *context) isTexture(t textureNative) bool {
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2020-10-18 11:28:23 +02:00
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return c.ctx.IsTexture(uint32(t))
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2016-06-12 16:54:36 +02:00
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}
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2018-11-10 17:14:26 +01:00
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func (c *context) newFramebuffer(texture textureNative) (framebufferNative, error) {
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2020-10-18 11:28:23 +02:00
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f := c.ctx.GenFramebuffers(1)[0]
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if f <= 0 {
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return 0, fmt.Errorf("opengl: creating framebuffer failed: the returned value is not positive but %d", f)
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2016-02-24 15:30:43 +01:00
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}
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2018-11-04 09:43:26 +01:00
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c.bindFramebuffer(framebufferNative(f))
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2014-12-31 07:22:15 +01:00
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2020-10-18 11:28:23 +02:00
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c.ctx.FramebufferTexture2D(gles.FRAMEBUFFER, gles.COLOR_ATTACHMENT0, gles.TEXTURE_2D, uint32(texture), 0)
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s := c.ctx.CheckFramebufferStatus(gles.FRAMEBUFFER)
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2020-10-18 11:09:10 +02:00
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if s != gles.FRAMEBUFFER_COMPLETE {
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2016-02-05 19:48:15 +01:00
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if s != 0 {
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2020-10-18 11:28:23 +02:00
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return 0, fmt.Errorf("opengl: creating framebuffer failed: %v", s)
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2016-02-05 19:48:15 +01:00
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}
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2020-10-18 11:28:23 +02:00
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if e := c.ctx.GetError(); e != gles.NO_ERROR {
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return 0, fmt.Errorf("opengl: creating framebuffer failed: (glGetError) %d", e)
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2016-02-05 19:48:15 +01:00
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}
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2020-10-18 11:28:23 +02:00
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return 0, fmt.Errorf("opengl: creating framebuffer failed: unknown error")
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2014-12-31 07:22:15 +01:00
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}
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2018-11-04 09:43:26 +01:00
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return framebufferNative(f), nil
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2014-12-31 07:22:15 +01:00
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}
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2014-12-31 08:12:13 +01:00
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2018-11-10 17:14:26 +01:00
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func (c *context) setViewportImpl(width, height int) {
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2020-10-18 11:28:23 +02:00
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c.ctx.Viewport(0, 0, int32(width), int32(height))
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2014-12-31 10:23:18 +01:00
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}
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2018-11-10 17:14:26 +01:00
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func (c *context) deleteFramebuffer(f framebufferNative) {
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2020-10-18 11:28:23 +02:00
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if !c.ctx.IsFramebuffer(uint32(f)) {
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2016-06-12 16:19:01 +02:00
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return
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}
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2016-07-06 19:08:28 +02:00
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// If a framebuffer to be deleted is bound, a newly bound framebuffer
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2016-06-03 20:40:56 +02:00
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// will be a default framebuffer.
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// https://www.khronos.org/opengles/sdk/docs/man/xhtml/glDeleteFramebuffers.xml
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if c.lastFramebuffer == f {
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2016-06-17 21:46:33 +02:00
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c.lastFramebuffer = invalidFramebuffer
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2016-06-05 00:47:11 +02:00
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c.lastViewportWidth = 0
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c.lastViewportHeight = 0
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2016-06-03 20:40:56 +02:00
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}
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2020-10-18 11:28:23 +02:00
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c.ctx.DeleteFramebuffers([]uint32{uint32(f)})
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2014-12-31 10:23:18 +01:00
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}
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2018-11-10 17:14:26 +01:00
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func (c *context) newShader(shaderType shaderType, source string) (shader, error) {
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2020-10-18 11:28:23 +02:00
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s := c.ctx.CreateShader(uint32(shaderType))
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if s == 0 {
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return 0, fmt.Errorf("opengl: glCreateShader failed: shader type: %d", shaderType)
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2014-12-31 08:12:13 +01:00
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}
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2020-10-18 11:28:23 +02:00
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c.ctx.ShaderSource(s, source)
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c.ctx.CompileShader(s)
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v := make([]int32, 1)
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c.ctx.GetShaderiv(v, s, gles.COMPILE_STATUS)
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if v[0] == gles.FALSE {
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log := c.ctx.GetShaderInfoLog(s)
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return 0, fmt.Errorf("opengl: shader compile failed: %s", log)
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2014-12-31 08:12:13 +01:00
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}
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2018-10-29 17:52:59 +01:00
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return shader(s), nil
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2014-12-31 08:12:13 +01:00
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}
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2018-11-10 17:14:26 +01:00
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func (c *context) deleteShader(s shader) {
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2020-10-18 11:28:23 +02:00
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c.ctx.DeleteShader(uint32(s))
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2014-12-31 10:23:18 +01:00
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}
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2019-02-16 06:03:21 +01:00
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func (c *context) newProgram(shaders []shader, attributes []string) (program, error) {
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2020-10-18 11:28:23 +02:00
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p := c.ctx.CreateProgram()
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if p == 0 {
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return 0, errors.New("opengl: glCreateProgram failed")
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2014-12-31 08:12:13 +01:00
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}
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2014-12-31 08:48:25 +01:00
|
|
|
for _, shader := range shaders {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.AttachShader(p, uint32(shader))
|
2014-12-31 08:48:25 +01:00
|
|
|
}
|
2019-02-16 06:03:21 +01:00
|
|
|
|
|
|
|
for i, name := range attributes {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.BindAttribLocation(p, uint32(i), name)
|
2019-02-16 06:03:21 +01:00
|
|
|
}
|
|
|
|
|
2020-10-18 11:28:23 +02:00
|
|
|
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)
|
2014-12-31 08:12:13 +01:00
|
|
|
}
|
2018-10-29 17:52:59 +01:00
|
|
|
return program(p), nil
|
2014-12-31 08:12:13 +01:00
|
|
|
}
|
2014-12-31 09:45:23 +01:00
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) useProgram(p program) {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.UseProgram(uint32(p))
|
2014-12-31 10:23:18 +01:00
|
|
|
}
|
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) deleteProgram(p program) {
|
2020-10-18 11:28:23 +02:00
|
|
|
if !c.ctx.IsProgram(uint32(p)) {
|
2016-07-12 19:07:35 +02:00
|
|
|
return
|
|
|
|
}
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.DeleteProgram(uint32(p))
|
2016-07-03 17:23:45 +02:00
|
|
|
}
|
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) getUniformLocationImpl(p program, location string) uniformLocation {
|
2020-10-18 11:28:23 +02:00
|
|
|
u := uniformLocation(c.ctx.GetUniformLocation(uint32(p), location))
|
2015-01-28 16:58:56 +01:00
|
|
|
return u
|
2015-01-12 15:16:34 +01:00
|
|
|
}
|
|
|
|
|
2020-05-27 04:07:21 +02:00
|
|
|
func (c *context) uniformInt(p program, location string, v int) bool {
|
|
|
|
l := c.locationCache.GetUniformLocation(c, p, location)
|
|
|
|
if l == invalidUniform {
|
|
|
|
return false
|
|
|
|
}
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.Uniform1i(int32(l), int32(v))
|
2020-05-27 04:07:21 +02:00
|
|
|
return true
|
2015-01-03 07:52:02 +01:00
|
|
|
}
|
|
|
|
|
2020-05-27 04:07:21 +02:00
|
|
|
func (c *context) uniformFloat(p program, location string, v float32) bool {
|
|
|
|
l := c.locationCache.GetUniformLocation(c, p, location)
|
|
|
|
if l == invalidUniform {
|
|
|
|
return false
|
|
|
|
}
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.Uniform1f(int32(l), v)
|
2020-05-27 04:07:21 +02:00
|
|
|
return true
|
2018-02-22 03:46:46 +01:00
|
|
|
}
|
|
|
|
|
2020-07-30 19:52:25 +02:00
|
|
|
func (c *context) uniformFloats(p program, location string, v []float32, typ shaderir.Type) bool {
|
2020-05-27 04:07:21 +02:00
|
|
|
l := c.locationCache.GetUniformLocation(c, p, location)
|
|
|
|
if l == invalidUniform {
|
|
|
|
return false
|
|
|
|
}
|
2020-07-30 19:52:25 +02:00
|
|
|
|
|
|
|
base := typ.Main
|
|
|
|
if base == shaderir.Array {
|
|
|
|
base = typ.Sub[0].Main
|
|
|
|
}
|
|
|
|
|
|
|
|
switch base {
|
|
|
|
case shaderir.Float:
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.Uniform1fv(int32(l), v)
|
2020-07-30 19:52:25 +02:00
|
|
|
case shaderir.Vec2:
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.Uniform2fv(int32(l), v)
|
2020-07-30 19:52:25 +02:00
|
|
|
case shaderir.Vec3:
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.Uniform3fv(int32(l), v)
|
2020-07-30 19:52:25 +02:00
|
|
|
case shaderir.Vec4:
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.Uniform4fv(int32(l), v)
|
2020-07-30 19:52:25 +02:00
|
|
|
case shaderir.Mat2:
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.UniformMatrix2fv(int32(l), false, v)
|
2020-07-30 19:52:25 +02:00
|
|
|
case shaderir.Mat3:
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.UniformMatrix3fv(int32(l), false, v)
|
2020-07-30 19:52:25 +02:00
|
|
|
case shaderir.Mat4:
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.UniformMatrix4fv(int32(l), false, v)
|
2015-01-03 07:21:47 +01:00
|
|
|
default:
|
2020-07-30 19:52:25 +02:00
|
|
|
panic(fmt.Sprintf("opengl: unexpected type: %s", typ.String()))
|
2014-12-31 12:07:27 +01:00
|
|
|
}
|
2020-05-27 04:07:21 +02:00
|
|
|
return true
|
2014-12-31 10:23:18 +01:00
|
|
|
}
|
|
|
|
|
2019-02-16 06:03:21 +01:00
|
|
|
func (c *context) vertexAttribPointer(p program, index int, size int, dataType dataType, stride int, offset int) {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.VertexAttribPointer(uint32(index), int32(size), uint32(dataType), false, int32(stride), offset)
|
2014-12-31 10:23:18 +01:00
|
|
|
}
|
|
|
|
|
2019-02-16 06:03:21 +01:00
|
|
|
func (c *context) enableVertexAttribArray(p program, index int) {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.EnableVertexAttribArray(uint32(index))
|
2014-12-31 10:23:18 +01:00
|
|
|
}
|
|
|
|
|
2019-02-16 06:03:21 +01:00
|
|
|
func (c *context) disableVertexAttribArray(p program, index int) {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.DisableVertexAttribArray(uint32(index))
|
2014-12-31 10:23:18 +01:00
|
|
|
}
|
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) newArrayBuffer(size int) buffer {
|
2020-10-18 11:28:23 +02:00
|
|
|
b := c.ctx.GenBuffers(1)[0]
|
|
|
|
c.ctx.BindBuffer(uint32(arrayBuffer), b)
|
|
|
|
c.ctx.BufferData(uint32(arrayBuffer), size, nil, uint32(dynamicDraw))
|
2018-10-29 17:52:59 +01:00
|
|
|
return buffer(b)
|
2017-08-31 18:29:56 +02:00
|
|
|
}
|
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) newElementArrayBuffer(size int) buffer {
|
2020-10-18 11:28:23 +02:00
|
|
|
b := c.ctx.GenBuffers(1)[0]
|
|
|
|
c.ctx.BindBuffer(uint32(elementArrayBuffer), b)
|
|
|
|
c.ctx.BufferData(uint32(elementArrayBuffer), size, nil, uint32(dynamicDraw))
|
2018-10-29 17:52:59 +01:00
|
|
|
return buffer(b)
|
2015-01-17 04:45:19 +01:00
|
|
|
}
|
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) bindBuffer(bufferType bufferType, b buffer) {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.BindBuffer(uint32(bufferType), uint32(b))
|
2014-12-31 09:45:23 +01:00
|
|
|
}
|
2014-12-31 09:53:04 +01:00
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) arrayBufferSubData(data []float32) {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.BufferSubData(uint32(arrayBuffer), 0, float32sToBytes(data))
|
2018-05-30 17:53:02 +02:00
|
|
|
}
|
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) elementArrayBufferSubData(data []uint16) {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.BufferSubData(uint32(elementArrayBuffer), 0, uint16sToBytes(data))
|
2014-12-31 09:53:04 +01:00
|
|
|
}
|
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) deleteBuffer(b buffer) {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.DeleteBuffers([]uint32{uint32(b)})
|
2016-07-03 17:23:45 +02:00
|
|
|
}
|
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) drawElements(len int, offsetInBytes int) {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.DrawElements(gles.TRIANGLES, int32(len), gles.UNSIGNED_SHORT, offsetInBytes)
|
2014-12-31 09:53:04 +01:00
|
|
|
}
|
2016-06-06 19:24:36 +02:00
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) maxTextureSizeImpl() int {
|
2020-10-18 11:28:23 +02:00
|
|
|
v := make([]int32, 1)
|
|
|
|
c.ctx.GetIntegerv(v, gles.MAX_TEXTURE_SIZE)
|
|
|
|
return int(v[0])
|
2018-03-09 03:03:55 +01:00
|
|
|
}
|
|
|
|
|
2019-06-21 21:47:48 +02:00
|
|
|
func (c *context) getShaderPrecisionFormatPrecision() int {
|
2020-10-18 11:28:23 +02:00
|
|
|
_, _, p := c.ctx.GetShaderPrecisionFormat(gles.FRAGMENT_SHADER, gles.HIGH_FLOAT)
|
2019-06-21 21:47:48 +02:00
|
|
|
return p
|
|
|
|
}
|
|
|
|
|
2018-11-10 17:14:26 +01:00
|
|
|
func (c *context) flush() {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.Flush()
|
2016-06-06 19:24:36 +02:00
|
|
|
}
|
2019-05-26 12:08:46 +02:00
|
|
|
|
|
|
|
func (c *context) needsRestoring() bool {
|
|
|
|
return true
|
|
|
|
}
|
2020-01-01 19:58:49 +01:00
|
|
|
|
|
|
|
func (c *context) canUsePBO() bool {
|
2020-01-19 08:10:49 +01:00
|
|
|
// 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.
|
2020-01-01 19:58:49 +01:00
|
|
|
return false
|
|
|
|
}
|
|
|
|
|
|
|
|
func (c *context) texSubImage2D(t textureNative, width, height int, args []*driver.ReplacePixelsArgs) {
|
|
|
|
c.bindTexture(t)
|
|
|
|
for _, a := range args {
|
2020-10-18 11:28:23 +02:00
|
|
|
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)
|
2020-01-01 19:58:49 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
func (c *context) newPixelBufferObject(width, height int) buffer {
|
2020-10-18 11:28:23 +02:00
|
|
|
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)
|
2020-01-01 19:58:49 +01:00
|
|
|
return buffer(b)
|
|
|
|
}
|
|
|
|
|
|
|
|
func (c *context) replacePixelsWithPBO(buffer buffer, t textureNative, width, height int, args []*driver.ReplacePixelsArgs) {
|
2020-01-19 08:10:49 +01:00
|
|
|
// This implementation is not used yet so far. See the comment at canUsePBO.
|
|
|
|
|
2020-01-01 19:58:49 +01:00
|
|
|
c.bindTexture(t)
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.BindBuffer(gles.PIXEL_UNPACK_BUFFER, uint32(buffer))
|
2020-01-01 19:58:49 +01:00
|
|
|
|
|
|
|
stride := 4 * width
|
|
|
|
for _, a := range args {
|
|
|
|
offset := 4 * (a.Y*width + a.X)
|
|
|
|
for j := 0; j < a.Height; j++ {
|
2020-10-18 11:28:23 +02:00
|
|
|
c.ctx.BufferSubData(gles.PIXEL_UNPACK_BUFFER, offset+stride*j, a.Pixels[4*a.Width*j:4*a.Width*(j+1)])
|
2020-01-01 19:58:49 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-10-18 11:28:23 +02:00
|
|
|
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)
|
2020-01-01 19:58:49 +01:00
|
|
|
}
|
2020-11-11 14:43:54 +01:00
|
|
|
|
|
|
|
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")
|
|
|
|
}
|