TDA4VM: TDA4VM ，mipmap problem of opengl texture

li daming

Part Number: TDA4VM
Other Parts Discussed in Thread: TDA4VH,

Hello

TDA4VH
SDK: 8.2.2

Issue：

When TDA4VH is testing texture size 1420 x 2880 (W x H), format RGB565 or RGB888, sampling to a smaller size, such as 960 x 720, the picture will randomly have mosaic errors, there is no such problem on TDA4VM, turn off mipmap The picture is fine.

param detail：

glGenTextures(1, &m_hTexture);

glBindTexture(GL_TEXTURE_2D, m_hTexture);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

// set texture wrapping to GL_REPEAT (default wrapping method)

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

over 3 years ago

0 Erick Narvaez over 3 years ago

TI__Mastermind 36307 points

Hello,

Do you have a sample application we can test on our side? This will speed up our check-out of this issue.

Regards,

Erick

0 li daming over 3 years ago in reply to Erick Narvaez

Prodigy 200 points

uint32_t m_hFrameBuffer;

uint32_t m_hRenderBuffer;

uint32_t m_hTexture;

// Create an offscreen texture

glGenTextures(1, &m_hTexture);

glBindTexture(GL_TEXTURE_2D, m_hTexture);

// glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB565, m_nWidth, m_nHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL); // No

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_nWidth, m_nHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL); // Yes

glGenerateMipmap(GL_TEXTURE_2D);

// 为当前绑定的纹理对象设置环绕、过滤方式

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

// Create the depth buffer

glGenRenderbuffers(1, &m_hRenderBuffer);

glBindRenderbuffer(GL_RENDERBUFFER, m_hRenderBuffer);

glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, m_nWidth, m_nHeight);

// Create the color buffer

glGenFramebuffers(1, &m_hFrameBuffer);

glBindFramebuffer(GL_FRAMEBUFFER, m_hFrameBuffer);

glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_hTexture, 0);

glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, m_hRenderBuffer);

0 li daming over 3 years ago in reply to li daming

Prodigy 200 points

The texture format is GL_RGB565 and bind the FBO, mipmap sampling is incorrect! The texture format is GL_RGB8 and bind the FBO, mipmap sampling is OK!

0 li daming over 3 years ago in reply to Erick Narvaez

Prodigy 200 points

7651.sample.zip

Sample is here!

0 Erick Narvaez over 3 years ago in reply to li daming

TI__Mastermind 36307 points

Hi,

Would it be possible to collect a debug capture on your side? You can follow this guide to use PVRCarbon, which is part of Imagination Technologies suite of tools:

Documentation: https://docs.imgtec.com/tools-manuals/pvrcarbon-manual/topics/pvrcarbon-recorder/introduction.html

Recording instructions: https://docs.imgtec.com/tools-manuals/pvrcarbon-manual/topics/pvrcarbon-recorder/stopping-recording.html

Tool Download: https://developer.imaginationtech.com/downloads/

If you can capture this here, we will be better able to investigate the specific OpenGL calls and hopefully identify the issue.

Regards,

Erick