depthTextureInitial -> u_DepthMap

Needed for `PushBuffer`.

Author: VReaperV

src/engine/renderer/gl_shader.cpp

@@ -3029,11 +3029,12 @@ GLShader_depthReduction::GLShader_depthReduction() :
 		false, "depthReduction" ),
 	u_ViewWidth( this ),
 	u_ViewHeight( this ),
+	u_DepthMap( this ),
 	u_InitialDepthLevel( this ) {
 }
 
 void GLShader_depthReduction::SetShaderProgramUniforms( ShaderProgramDescriptor* shaderProgram ) {
-	glUniform1i( glGetUniformLocation( shaderProgram->id, "depthTextureInitial" ), 0 );
+	glUniform1i( glGetUniformLocation( shaderProgram->id, "u_DepthMap" ), 0 );
 }
 
 GLShader_clearSurfaces::GLShader_clearSurfaces() :

src/engine/renderer/gl_shader.h

@@ -3761,6 +3761,7 @@ class GLShader_depthReduction :
 	public GLShader,
 	public u_ViewWidth,
 	public u_ViewHeight,
+	public u_DepthMap,
 	public u_InitialDepthLevel {
 	public:
 	GLShader_depthReduction();

src/engine/renderer/glsl_source/depthReduction_cp.glsl

@@ -39,7 +39,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 // Keep this to 8x8 because we don't want extra shared mem etc. to be allocated, and to minimize wasted lanes
 layout (local_size_x = 8, local_size_y = 8, local_size_z = 1) in;
 
-layout(binding = 0) uniform sampler2D depthTextureInitial;
+layout(binding = 0) uniform sampler2D u_DepthMap;
 layout(r32f, binding = 1) uniform readonly image2D depthImageIn;
 layout(r32f, binding = 2) uniform writeonly image2D depthImageOut;
 
@@ -57,7 +57,7 @@ void main() {
 
     // Depth buffer uses a packed D24S8 format, so we have to copy it over to an r32f image first
     if( u_InitialDepthLevel ) {
-        vec4 depthOut = texelFetch( depthTextureInitial, position, 0 );
+        vec4 depthOut = texelFetch( u_DepthMap, position, 0 );
         imageStore( depthImageOut, position, depthOut );
     } else {
         float depth[4];