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Add a draw2dImage function to display glsl rtt

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This commit is contained in:
vlj
2014-05-22 01:29:40 +02:00
parent 0b091e3095
commit bca5beeaa7
2 changed files with 40 additions and 16 deletions
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51
src/graphics/glwrap.cpp
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@@ -634,14 +634,15 @@ static void drawTexColoredQuad(const video::ITexture *texture, const video::SCol
glGetError();
}
void drawTexQuad(const video::ITexture *texture, float width, float height,
static
void drawTexQuad(GLuint texture, float width, float height,
float center_pos_x, float center_pos_y, float tex_center_pos_x, float tex_center_pos_y,
float tex_width, float tex_height)
{
glUseProgram(UIShader::TextureRectShader::Program);
glBindVertexArray(UIShader::TextureRectShader::vao);
setTexture(0, static_cast<const irr::video::COpenGLTexture*>(texture)->getOpenGLTextureName(), GL_LINEAR, GL_LINEAR);
setTexture(0, texture, GL_LINEAR, GL_LINEAR);
UIShader::TextureRectShader::setUniforms(center_pos_x, center_pos_y, width, height, tex_center_pos_x, tex_center_pos_y, tex_width, tex_height, 0);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
@@ -652,7 +653,8 @@ void drawTexQuad(const video::ITexture *texture, float width, float height,
}
static void
getSize(const video::ITexture* texture, const core::rect<s32>& destRect,
getSize(unsigned texture_width, unsigned texture_height, bool textureisRTT,
const core::rect<s32>& destRect,
const core::rect<s32>& sourceRect,
float &width, float &height,
float &center_pos_x, float &center_pos_y,
@@ -675,23 +677,20 @@ getSize(const video::ITexture* texture, const core::rect<s32>& destRect,
height = float(destRect.LowerRightCorner.Y - destRect.UpperLeftCorner.Y);
height /= screen_h;
const core::dimension2d<u32>& ss = texture->getOriginalSize();
tex_center_pos_x = float(sourceRect.UpperLeftCorner.X + sourceRect.LowerRightCorner.X);
tex_center_pos_x /= ss.Width * 2.f;
tex_center_pos_x /= texture_width * 2.f;
tex_center_pos_y = float(sourceRect.UpperLeftCorner.Y + sourceRect.LowerRightCorner.Y);
tex_center_pos_y /= ss.Height * 2.f;
tex_center_pos_y /= texture_height * 2.f;
tex_width = float(sourceRect.LowerRightCorner.X - sourceRect.UpperLeftCorner.X);
tex_width /= ss.Width * 2.f;
tex_width /= texture_width * 2.f;
tex_height = float(sourceRect.LowerRightCorner.Y - sourceRect.UpperLeftCorner.Y);
tex_height /= ss.Height * 2.f;
tex_height /= texture_height * 2.f;
if (texture->isRenderTarget())
{
if (textureisRTT)
tex_height = -tex_height;
}
const f32 invW = 1.f / static_cast<f32>(ss.Width);
const f32 invH = 1.f / static_cast<f32>(ss.Height);
const f32 invW = 1.f / static_cast<f32>(texture_width);
const f32 invH = 1.f / static_cast<f32>(texture_height);
const core::rect<f32> tcoords(
sourceRect.UpperLeftCorner.X * invW,
sourceRect.UpperLeftCorner.Y * invH,
@@ -716,7 +715,8 @@ void draw2DImage(const video::ITexture* texture, const core::rect<s32>& destRect
tex_width, tex_height,
tex_center_pos_x, tex_center_pos_y;
getSize(texture, destRect, sourceRect, width, height, center_pos_x, center_pos_y,
getSize(texture->getOriginalSize().Width, texture->getOriginalSize().Height, texture->isRenderTarget(),
destRect, sourceRect, width, height, center_pos_x, center_pos_y,
tex_width, tex_height, tex_center_pos_x, tex_center_pos_y);
if (useAlphaChannelOfTexture)
@@ -755,6 +755,24 @@ void draw2DImage(const video::ITexture* texture, const core::rect<s32>& destRect
glGetError();
}
void draw2DImageFromRTT(GLuint texture, size_t texture_w, size_t texture_h,
const core::rect<s32>& destRect,
const core::rect<s32>& sourceRect, const core::rect<s32>* clipRect,
bool useAlphaChannelOfTexture)
{
float width, height,
center_pos_x, center_pos_y,
tex_width, tex_height,
tex_center_pos_x, tex_center_pos_y;
getSize(texture_w, texture_h, false,
destRect, sourceRect, width, height, center_pos_x, center_pos_y,
tex_width, tex_height, tex_center_pos_x, tex_center_pos_y);
drawTexQuad(texture, width, height, center_pos_x, center_pos_y,
tex_center_pos_x, tex_center_pos_y, tex_width, tex_height);
}
void draw2DImage(const video::ITexture* texture, const core::rect<s32>& destRect,
const core::rect<s32>& sourceRect, const core::rect<s32>* clipRect,
const video::SColor* const colors, bool useAlphaChannelOfTexture)
@@ -770,7 +788,8 @@ void draw2DImage(const video::ITexture* texture, const core::rect<s32>& destRect
tex_width, tex_height,
tex_center_pos_x, tex_center_pos_y;
getSize(texture, destRect, sourceRect, width, height, center_pos_x, center_pos_y,
getSize(texture->getOriginalSize().Width, texture->getOriginalSize().Height, texture->isRenderTarget(),
destRect, sourceRect, width, height, center_pos_x, center_pos_y,
tex_width, tex_height, tex_center_pos_x, tex_center_pos_y);
if (useAlphaChannelOfTexture)
@@ -796,7 +815,7 @@ void draw2DImage(const video::ITexture* texture, const core::rect<s32>& destRect
drawTexColoredQuad(texture, colors, width, height, center_pos_x, center_pos_y,
tex_center_pos_x, tex_center_pos_y, tex_width, tex_height);
else
drawTexQuad(texture, width, height, center_pos_x, center_pos_y,
drawTexQuad(static_cast<const irr::video::COpenGLTexture*>(texture)->getOpenGLTextureName(), width, height, center_pos_x, center_pos_y,
tex_center_pos_x, tex_center_pos_y, tex_width, tex_height);
if (clipRect)
glDisable(GL_SCISSOR_TEST);

5
src/graphics/glwrap.hpp
View File

@@ -216,6 +216,11 @@ void saveCompressedTexture(const std::string& compressed_tex);
void draw3DLine(const core::vector3df& start,
const core::vector3df& end, irr::video::SColor color);
void draw2DImageFromRTT(GLuint texture, size_t texture_w, size_t texture_h,
const core::rect<s32>& destRect,
const core::rect<s32>& sourceRect, const core::rect<s32>* clipRect,
bool useAlphaChannelOfTexture);
void draw2DImage(const irr::video::ITexture* texture, const irr::core::rect<s32>& destRect,
const irr::core::rect<s32>& sourceRect, const irr::core::rect<s32>* clipRect,
const irr::video::SColor &color, bool useAlphaChannelOfTexture);